13
Extended investigation of superdeformed bands in 151,152 Tb nuclei J. Robin, Th. Byrski, G. Duchˆ ene, F.A. Beck, D. Curien, N. Dubray, J. Dudek, A. G´ o&#378d&#378, A. Odahara, N. Schunck, et al. To cite this version: J. Robin, Th. Byrski, G. Duchˆ ene, F.A. Beck, D. Curien, et al.. Extended investigation of superdeformed bands in 151,152 Tb nuclei. Physical Review C, American Physical Society, 2008, 77, pp.014308. <10.1103/PhysRevC.77.014308>. <in2p3-00207925> HAL Id: in2p3-00207925 http://hal.in2p3.fr/in2p3-00207925 Submitted on 15 Feb 2008 HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci- entific research documents, whether they are pub- lished or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destin´ ee au d´ epˆ ot et ` a la diffusion de documents scientifiques de niveau recherche, publi´ es ou non, ´ emanant des ´ etablissements d’enseignement et de recherche fran¸cais ou ´ etrangers, des laboratoires publics ou priv´ es.

Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

  • Upload
    others

  • View
    5

  • Download
    0

Embed Size (px)

Citation preview

Page 1: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

Extended investigation of superdeformed bands in151,152Tb nuclei

J. Robin, Th. Byrski, G. Duchene, F.A. Beck, D. Curien, N. Dubray, J.

Dudek, A. Go&#378d&#378, A. Odahara, N. Schunck, et al.

To cite this version:

J. Robin, Th. Byrski, G. Duchene, F.A. Beck, D. Curien, et al.. Extended investigation ofsuperdeformed bands in 151,152Tb nuclei. Physical Review C, American Physical Society, 2008,77, pp.014308. <10.1103/PhysRevC.77.014308>. <in2p3-00207925>

HAL Id: in2p3-00207925

http://hal.in2p3.fr/in2p3-00207925

Submitted on 15 Feb 2008

HAL is a multi-disciplinary open accessarchive for the deposit and dissemination of sci-entific research documents, whether they are pub-lished or not. The documents may come fromteaching and research institutions in France orabroad, or from public or private research centers.

L’archive ouverte pluridisciplinaire HAL, estdestinee au depot et a la diffusion de documentsscientifiques de niveau recherche, publies ou non,emanant des etablissements d’enseignement et derecherche francais ou etrangers, des laboratoirespublics ou prives.

Page 2: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

������������ ������

���������������! ��#"$��%&�('*),+-�('*.$�/.,01��23�5476�89��:;����0<.,:>=?���A@B+C���3%D'E�GFIH�F�JKFIH�L�MONGPQ63RTSE��'

U>V>W�XZY([K\^]`_^a�b�V>c�dfehgjif[k]`_;lmV>n�o>p<b�qr \ r ]s_>t�V uvV;c r p<i>]I_>nwVyx#o>ej[ r \^]s_>z{V^n3o>Y(eh|`d>]I_;U>V>n�o>} r i>]s_>uvV;l�~XC~� }�~��� _>u{VT��}(|�b;|�e<|�]� �`_z{V^��p<bfo(\>p<i>]<� ��_>z{V>u�}�[K�m[��&_>nvV ��V(u3�(� r�� Y rI� _(��V;c r }�\>|Zehp � dfi>]<� ] � _>u{V;c#e<|Zp�p�X��`_>c�V;x r } r ej��| �K�K� _;�yV^x#X&o(eE�h[�\y]`_(nwV ��VTx#o �K��r \>��_�wV&n�XZeh�s|�o��;]I_��yV��,ej�s�o>p<i��s_flmV�} r t>eh|Z\>p r ]`_fc�V&l�| �K� ]s_���V�UZX�gEb>[k]I_��yV �,V���[�\( ��s_fu{V&��X&ej[�p<b([¡]£¢Z_��¤VZ��|�  r eh Ze r \ � _flmV���X{c#[�|�\;p�Xf]E�s_�yV;� r X&\([ � _>uvV>��X&� r ��¥ �¦|�ej� r \>g ]*¢ _;�TV>��o(\;|�e<}�[ ]h] _;c�V;�§[ �K� [�X&\ � _>uvV>z�X&o(ehe r }�[�\ r ] _;��V(�C|Zp<b>XZo>} ] _>��V¨�yV>�C|Zo � � _^x�V>� r �heh|&p<b r ]E� _©V>�,[�ª�o r e<|Zg]�_>zvV;W r }�XZ\^]E��_;u{V;��| � �<|�e r��K� [¡]E�s_>U;V;�f[K�m�;gEX&\ � _^�wV^��� r � Xs��gji�[¡]E�s_>W9V(« r \��jo(e r��K� [¡]h]`_>U;V ��V>«3[K��[ r \y]�|�\>}¬�¤V;­^o(Y r e�] �®j¯E°�±*²k³�²k´�²¤µs¶1·$¶£¸E¹�¶jº�¸E¹�¶j±§»�´&¼*½�²¿¾�À�³¡Áh´�¶j±EÂ

Ã(Ä ·ÆÅ�Ç`È`È�Âm¯£É�Ê�Ë,ÌIÍEÎ^É$·#»fÍ Ã�Ï ËCÂÐ ÍÒÑsÅIÈ�Ì�Å�»^Ó;·,Ô�»�Õ�Ö Ã ·�×AÎ�¶£µs¶£Ø�Ê` Рº£½�°f¸j¶Ù É�³�±�¹�³�°&³ Ú`ÚZ¾�°Û¯E°�±*²k³�²k´�²Ü¶Ý¾�ÞBÓ�¶*¸E¹s°�¾Ißà¾*á�â�Âã ½�°�µ`½� Р´sä�´&¾�äI½æå�È`È�Í�È�Ì�Âèç�½EÚZ½�°

é�ê ¶ÜÚZ½�ºE²kÀ{¶j°&²w¾�ÞëË�¹�â�±*³¡¸h±* à °&³�ì�¶jºE±E³K²kâ�¾�Þí»�´�ºjº£¶jâ�Â× Ã ÊîÅhï#ðñ×�´�³kßàµ�Þ<¾�º£µ�¤»&´�ºjº£¶jâ� Ã�ã

ò ê ¶ÜÚZ½�ºj²kÀ9¶j°�²m¾�Þ¤Ë�¹�â�±*³¡¸h±* à °�³�ì�¶jºE±*³�²kâ�¾ÒÞ Ï ´&¼<ß ³�°&ÂË Ï Í¿ÊZÈIÈ�Ì�ó Ï ´�¼<ß ³K°�ÂwË,¾Ißà½�°�µ

ô à »yÓ;ð$Õ,Â�¯E°&±*²k³�²k´�²ëµs¶íË�¹�â�±*³¡Áh´�¶jÂwÕ�Ë,ÌIÊIÂõ ß#Ô#ß ³¡½�Â�Õ#½I¼ õ�ö*ö ¾�´&½�ºEÂíó`Ñ`óIó`ó¦Ô#ß ás¶jºjÂ{Ô#ß ás¶jºj³k½

÷ ÎCÎ Ï ·�ÎTÂ ê ½�º£¶j±j¼h´ZºEâ Ï ½`¼*¾�º�½�²¿¾�ºEâ�Âê ½�º*¶j±j¼h´�ºEâQøm½�ºjºE³�°sá�²¿¾�°?ø�ÔCùÝù�Ô ê  à °&³�²Ü¶£µ ã ³K°�á`µ`¾�À

ú ê ³ ÚZ½�ºE²k³�À{¶j°&²¿¾Ýµ�³ Ð ³K±E³k¸E½¦µs¶hßKߣû à °&³�ì�¶jºj±*³�²�ü½Oµ�³ Ä ³kßà½�°�¾§½�°fµ¬¯£É Ð É�»(¶ ö ³¡¾�°(¶§µ�³ Ä ³kßà½�°�¾�ÂvÊZÈ`ó�ÌIÌ Ä ³kßà½�°f¾�Â{¯E²¿½�ß â

ý ·,¾�âI½Iß�¯E°�±*²k³�²k´�²Ü¶�¾�Þ�Ó(¶£¸E¹�°f¾Ißà¾*á�â�ÂÔ#ßà¼*½ÝÉ�¾�ì�½ à °�³�ì�¶jºE±*³�²kâþÎ�¶j°�²Ü¶jºE»fÍÒó`È`Ñ ÿ`ó�»&²¿¾¸Eä¹&¾Iß À�Âí» � ¶£µs¶j°��ÖCß ³�ì�¶jº Ï ¾µás¶ Ï ½I¼E¾�º£½�²¿¾�ºEâ� à °�³�ì�¶jºE±*³�²kâB¾ÒÞ Ï ³Kì�¶jºÜÚZ¾¾Iß Â

Ï ³�ì�¶jº¿ÚZ¾¾Iß Ï ÑIÿ Å�� õ  à °�³K²Ü¶*µ ã ³K°�á`µ`¾�À®�� Î�� »�¨É� »�� Ä � Â9¯£É�Ê�Ë,Ì`Í*Î��¨É�¨·�� »îÂÐ ÍÜÿsóhù�È�Ç Ö�ºE±j½�â Î�½�À�Ú�´Z±* Рº£½�°f¸j¶

®£®hê ³ ÚZ½�ºE²k³�À{¶j°&²¿¾Ýµ�³ Ð ³K±E³k¸E½¦µs¶hßKߣû à °&³�ì�¶jºj±*³�²�ü½Oµ�³#Ë,½`µ`¾�ì�½O½�°fµ¬¯£É Ð É�»�¶ ö ³k¾�°(¶¦µ�³3Ë,½`µ`¾�ì�½�ÂëÌsÇsó�Ìsó§Ë$½`µI¾�ì�½�Âw¯E²¿½Iß â

®ÜÙ ê ³ ÚZ½�ºE²k³�À9¶j°�²¿¾¦µ�³ Ð ³�±*³¡¸*½¦µs¶hß�ߣû à °�³�ì�¶jºE±*³�²�ü½¦µ�³9Î�½�À9¶jºj³�°f¾¦½�°�µè¯£É Ð É�»(¶ ö ³¡¾�°(¶§µ�³¤Î�½�À9¶jºj³K°�¾�ÂmÑ�ÊZÈ�ÌIÊ Î�½�À{¶jºE³�°f¾�Â{¯E²¿½�ß â

®¿é ¯E°�±*²k³�²k´�²¤µs¶�Ë�¹�â�±E³kÁh´f¶èÉ�´�¸<ß� ¶<½�³�º*¶jÂÐ ÍÒÑIÿsÑ�ÊIÊ��>³kß�ß ¶j´�ºh¼E½�°�°(¶�Î�¶£µs¶£Ø� Рº�½�°�¸E¶

® ò ¯E°&±E²k³K²k´Z²v¾ÒÞmÉ�´&¸<ß ¶£½�ºmË-¹�â�±*³¡¸h±*Â�Ë Ï ÍÜÌsó�ÍKùZÊ ã º£½ä� ¾ � Â�Ë$¾Ißà½�°�µ� ����������������� ��!"���$#í��%'&�)()(+*-,

�.� �/�0�)1323���546��!��7#98):<;'=�8�>?=@�A="�9=���> ���B���)=�� 4�13=@CD�E134$8)��8)F��G4?H"�)4������G=5F��/�$:I8)��JK�G�9>?1L��H5��H �M! 4$�N8):��H��C�POMQSRNT��VU<UEWYX[Zf \�0�G#]�A�$�0�G#_^PCDH ��H�13`+HZ a46�0����1346��1cb�4D�����0�M4$����H"�A4��A232c8�>d���e��H��D��f'���G= 4$138+=K8):;'= 8�>?=��Z��"�)=�� 4��A�d2c8�>g�A="�eH 1c`)H94$F�13=�4��'#]=��/>[Zf \�0�G#h�$�0�A=�4$1L��138+=�4G^�CDH �G4$�S�$�0�A=�4$1L��138+= 4G&��A4d1L�d��!7��=�4�8+!7��&'bG8)�$���G4$F�8)="���8i��H��K��8)�0����1c8)="�A2?:j����k_!��G= bG13�G4]>?H �����9��H��9F ��13=�b�1cF��)2D4$! F����0� �/:I8)��JK�G�l`-�)F 4 ��m�nNo+o &�p n * o ,bG238)4$�@`+13q'13=�`��1c4$�r��8s!�F& h8)�i� 8�>?=& ����G=�� 13=�`tJK�Gb0H"�A=�134$JK4G^uCDH�134@�G=��)� 2c��4@��8s�A�$�$��13��!7���v��H �w! ="� �/��23#713=�`l��H �G8)���/��1cbG�)2bG8+=7x"`+!7�0�A��138+= 4M>?1L��HwJ]!�b0HiH�13`)H�����b�8+= x"� �G= bG�]�)4NbG8)JKF"�������@��8E��H �]F7���Gq'138+!�4M1j�7�G=_��1Lx"b�����1c8)=�4G^�y13q-�z=��/>�Z�{�"�A="� 4]H"��q-�E���G�G=s� 134$bG8�q-�/������&���H ���G�58):S��H��GJ|�)4$4$13`)=����}��8r��H � ®Üô£Ù CD�s�)=��l��H��9�Y>D8v8)��H ����4h��8r��H��®Üôj® CD�~='!�bG23�G1�^KpV!�bG23�����JK���)=Z \x"�G2c�rb��)23bG! 2j����138+=�4zH"��q-�]���G�G=w!�4$���r��8@13=_������F ��������H �h46�$��! b���! ���e8A:�;'=�8�>?=�Z�����)="�74?�)4�>D��2c2<�)4?8):���H �N=��/>B8)=��G4?13=5���/��JK4�8):P='!�bG23�G8)=�13b�bG8)= x"`)! �0����1c8)=�4G^� ���P��A�-�V�7���a�/���+���L�0�+� ���'�'���)� �G�+� �d�'�_�+���L�0�+� �P���_���+� ���+� ��� �_���+� ���+� �<�

�A���� i¡z¢9£e¤@¥i¦]¡]�G£e 

a�b r �(b r \(XZ� r \>XZ\¬X'§�\fo>p �Kr |Ze�gEo(� r e<} r §¡XZeh�¤|��j[KXZ\¬|s��b([K Zbgj�([�\;gvb>|&g{Y r�r \ gE�jo>}�[ r }æ[�\�� r \>gj[�� r�� d�gj[�\;p rs¨+©7ª « �7b r \��hb r¬ e<g*�$gjo(� r e<} r §¡X&ej� r }wY;|�\>}¤[K\¤�jb r eh|Ze r ¥ r |�ej�jbv\fo>p ��r o>g�]E�h��n�db>|&gæY r�r \­§¡X&o(\>}T_¬W r §*V¯® ¨�° V a�b r gj[K\(  �Kr ¥ �>|�ej�j[�p �Kr XZehY([��h| � ¥gE�jeho>p�ho(e r X'§7�jb r \fo>p �Kr |Zewgjo(� r eh} r §¡XZeh� r }�gE�h|�� r gvb>|ZgvY r�r \e r�� |s�j[K� r�� dmgE[K�¤� � dm[�} r \&�h[ ¬ r }ë[K\ ]E�j� n3d¤\fo>p ��r o>g$|Z\>}ë[K\1|e§ r �X'§�[��hg{}�[Ke r p�{\ r [K ZbfY;X&ehgh§¡X&e��jb r d�e<|ZgE��_�|�\>}±§¡XZe{|~§ r � � Xs� ¥� d�[K\(  r �(p�[�� r } Y>|�\;}(gA²e§¡X&eí�hb rÝr |�e � d r �&X � o��j[KXZ\ X'§9�jb r [K\ ¥

§¡X&ej�ë|��j[KXZ\¦X&\¦�jb r gjo(� r e<} r §¡X&ej� r }§\fo>p �Kr [��hb r e r |&} r e�[�g�e r ¥§ r eje r }è�hXë�jb r e r �f[ r ��g9® ³ ° V7©���[Kg3e r�� |��j[K� r�� d r |Zgjdí�hXí�(ehXZ�^X&g r�hb r{� Xs� r g*� ¥ r \ r eh Zd±´ ¨ ¥ �>|ZeE�h[Kp ��r-µ ¥ ´ ¨ ¥ b(X ��r-µ$r �(p�[��h|s�h[�X&\>g�|&p�ehX&ghg�hb r Y([� mgEb r��K�  �|��>g ��r |Z}�[K\( v�jX � Xs� r gE� ¥ r \ r ej &d r �(p�[ � r }ëY>|Z\>}(g® g r�r �hb r }([Kghp�o>ghgj[�X&\ëY r�� Xs�9_f|�\>}í[�\í�;|�ej�j[�p�o � |�e$�jb r e r gEo � �hg#[K\t-[K &g�VV´a¶ µ |Z\>}·´\¸ µ6° V}¹�Xs� r � r eI_��7[��jbæ[K\>p�e r |Zgj[�\(  r �(p�[��h|s�h[�X&\�hb r e r [�g�| � |�eh  r [�\;p�e r |Zg r [K\��jb r \fo(�wY r e�X'§��^X&ghgE[KY �Kr �>|�ej�j[�p �Kr ¥b>X �Kr p�X&\ ¬  Zo>eh|��j[KXZ\>g��hb>|s��}�[jº r e3XZ\ � d � [ �j� �Kr [K\§� r ej�ëg�X7§C�jb r� ¥ b r �(p�[��h|��j[KXZ\ r \ r ej &dZVÛ�§X&e r Xs� r e�_C�ë|�\fd�X7§3�jb r g r Y>|Z\>}(gb;|`� r � r ehdígj[��¤[ � |Ze�}(d�\;|��¤[Kp�| � �¤XZ� r \&�z»t¼��/½z¾A¿AÀ$ejXZ�h|��j[KXZ\>| �

Page 3: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

³

§¡e r ª�o r \;p�dZ_���_�Xs� r e��jb r �7b(X �Kr eh|Z\(  r X7§��jb r � ¥ |s��[�g9�7b r e r�jb r p�X&eje r gj�;X&\>}�[K\( ¬ª&o;|�\��j[��j[ r gw|�e r if\(Xs�7\ r �f� r eh[K� r \��h| �K� dZ_|�\;}Û�hbfo>gm�jb r [K} r \��j[ ¬ p�|��j[KXZ\DX'§��jb r p�XZehe r gE�^XZ\>}([�\( �Y>|Z\>}(g�jo>ej\>g�X&o��7�jXëY r |��wY([K ZXZo;g�V��\ r �;X�gjgj[KY ��r ��|`dvX&o��,X'§T}�[��íp�o � �j[ r g$e r�� |�� r }w�hX9�jb r [�} r \ ¥

�j[ ¬ p�|s�j[KXZ\§X7§��hb r Y>|Z\>}(g��hb>|s��|�e r [�\>p�e r |Zgj[�\>  � d1p�X&�m� � [�p�|�� r }[K\ �hb r [Ke¦�>|ZeE�h[Kp ��r ¥ b>X �Kr gE�jeho>p��jo(e r p�|�\ Y r �(ehXZ�^X&g r } �7b r \gE�jo>}�df[K\(  �jb r �*df�([Kp�| � gE[K\(  ��r ¥ �>|ZeE�h[Kp ��r ejX&o��jb>[K|Z\ g*�hejo;p�jo>e r|�ehXZo>\>}æ�hb r Y([K æ��nG �|��>g�V ©£\ �>|ZeE�h[Kp�o � |Ze�_$�jb r �(nG�ë|� &[Kp &|Z�>g{|Ze r �hb r1� |�eh  r g*�{|s�mgE�ë| �K� ehX��<|s�h[�X&\>| � §¡e r ª�o r \>p�[ r gvY(o���jb r d¬p � X&g r  Ze<|Z}�o;| �K� dí�7[��jb§[K\>p�e r |Zgj[�\( íp�eh|Z\(if[�\> i§¡e r ª&o r \>p�dZV©��7�jb r \~§¡X �K� Xs��g#�hb>|s���7b r \��jb r §¡e r ª�o r \>p�[ r g7|Ze r gEo��ëp�[ r \�� � d� |�eh  r _��`|Zej[KXZo;g�p<b;|�e<|Zp� r eh[KgE�j[�pmp�ehX&ghgE[K\( &g�|Z�mX&\( è�jb r gj[�\>  �Kr ¥�>|ZeE�h[Kp ��r ehXZo(�jb([�|�\>gC�h|�i r � � |Zp r �jb>|���p�|Z\ëY r o>g r }m�jXv[K} r \��j[j§¡d�jb r p�X&\ ¬  &o(eh|��j[KXZ\>g�V�¹3Xs� r � r eI_��(e r �f[KXZo>g r ��� r ej[K� r \��h| � }(|��h|� r e r X7§k� r \ \(X��ëif\(Xs�7\DgEo��íp�[ r \&� � dÛb([� &bÛ[K\Dgj�([K\D|Z\>}��hb rp�X&�¤�>|�eh[KgjXZ\�X'§��jb r,r ��� r eh[�� r \��<| � Y>|Z\>}�p�ehX&ghgE[K\( �gy�7[ �hb��jb(X�g rp<b>|Zeh|&p� r ej[�gE�j[�p7XZ\ r g��(e r }�[�p� r }íYfd¤�jb r XZehdë��|Zg#\(X��7�^X&ghgE[KY �Kr V©£\9�jb([�g��>|�� r e-� r �(e r g r \����jb r }(|��h|7X&\9�jb r#r �f� r \>} r }9dfeh|&g*�

|�\;} r �(p�[ � r } ��n Y;|�\>}(g�|�\;} | � gjXæ\ r � ��n Y>|�\;}(g1[K\þ�hb r]E�<]� ]*�h��a�Yè\fo>p �Kr [ÒVCa�b r g r }(|��h|vb>|`� r Y r�r \1X&Y��h|Z[�\ r }ë[K\è| ¨�� ¥}(|`d§eho(\ r ��� r ej[K� r \��{|s�{���W7��c�u����æ©£«w_��7b(X�g r �(eh[��ë|�ehd ZX�| � [Kg1�jb r g r |�e<p<b�§¡XZe�}�[�gjp�e r � rO� [K\(if[�\( Û�je<|�\>gj[��j[KXZ\>gv§¡ejX&��jb r dfe<|ZgE�¤��n!Y>|Z\>}��hXÝ\>XZeh�¤| � } r §¡XZeh� r } ´Üz3n µ g*�<|s� r gw[�\]E�<]�a�YÛ\fo>p �Kr o;g ® ¶ ° VBx#XZ\;g r ª&o r \�� � dZ_C|¦b>[� &bÛg*�<|s�h[KgE�j[�p1}(|��h|g r �#��|Zg$XZY��<|�[K\ r }�V-t>XZe,�hb r�r [K Zb�����n Y>|�\;}(g#| � e r |&}�dvif\(Xs�7\[K\B]E�<]�a�Y�_Tg r � r eh| � \ r � �je<|�\>gj[��j[KXZ\>g�b>|`� r Y r�r \ÝXZY>g r eh� r }¦|s��jb r b([� &b r gE��ejXZ�h|s�h[�X&\>| � §¡e r ª�o r \>p�[ r g7|Z\>}è|w�(e r p�[Kg r } r � r eh�m[ ¥\>|��j[KXZ\BX'§��ë|�\fd� ¥ e<|`d r \ r eh Z[ r g�b>|&g9Y r�r \�X&Y��h|Z[�\ r }TVèt-[K� r\ r � �(n Y>|Z\>}(g{b;|`� r Y r�r \æ}�[�ghp�Xs� r e r }T_��*��X§X'§��jb r � b>|`� rY r�r \§|&gjgj[� &\ r }í�jXè]E�<]�a�Y§|�\>}è�jb>e r�r �hX1]*�h��a�Y�V���7[�\( ¦�jX§�hb r b([K Zb ¥ ª�o>| � [��*d r �f� r eh[K� r \��h| � }(|s�<|(_-[�\æ�jb([�g

��XZehi1� r � r e r |ZY �Kr �jXí[�} r \&�h[c§¡d¬g r � r eh| � p�eh[��j[�p�| � �je<|�\>gj[ �h[�X&\>g�jb;|s�è[K\>}�[�p�|�� r g r � r e<| � \ r �Gp�ehX&ghgE[K\( �g¤Y r �*� r�r \î�jb r Y>|Z\>}(g|�\;}èp�XZ\>g r ª�o r \&� � d1b r�� ���jXëp � |�eh[c§¡dè|¤\�o>�vY r e7X'§-XZ� r \§ª�o r g ¥�j[KXZ\;g�e r�� |s� r }��hX3�hb r [K\�� r ej�(e r �<|s�h[�X&\9X'§(�hb(X&g r Y>|Z\>}(g�[�\v� r ej�ëgX'§-�jb r gE[K\(  �Kr ¥ �>|ZeE�h[Kp ��r ejX&o��jb>[K|Z\�gE�jeho>p�ho(e r Vc r�� Xs�A� r �(e r g r \��è�hb r \ r � r �f� r eh[K� r \��h| � e r gjo � �hg¬|�\>}

�jb r �hb r X&e r �j[�p�| � [K\�� r ej�(e r �<|s�h[�X&\vX'§;�jb r gE�jeho>p�ho(e r X7§>�jb r � r | ¥gjo(e r }�ejXZ�h|s�h[�X&\>| � ��n5Y>|Z\>}(g3Y>|Zg r }�XZ\��hb r p�eh|Z\(if[�\( ¤� r |Z\ ¥¬ r�� }¤|��>�(ejX�|Zp<b{�7[��jbm�hb r } r §¡X&ej� r } ��X�X�}(g ¥ ��|s��XZ\w�;XZ� r \&�h[K| �|Zp�p�X&eh}�[K\( è�jX¬[��hg�� o(\([K� r ehgh| � �y�>|�e<|�� r �hej[�gh|s�j[KXZ\�_�p�§*V1W r §*VS® ¸ °|�\;}¬e r § r e r \>p r g��hb r e r [K\�V�a�b r �>ejX�p r }�o(e r p�X&\>gE[�gE�hg�[K\¦p�| � p�o ¥� |s�j[K\( w�jb r » ¼K�/½ ¥ �¤XZ� r \��hg�X7§�g r � r eh| � bfo(\>}�e r }>g#X7§�Y>|Z\>}(g�|s�g r � r eh| � } r §¡XZeh�ë|s�h[�X&\æ�;X&[�\��<g@§¡ejX&� �jb r �f[Kp�[�\>[ �*d�X7§3�jb r |`� ¥r e<|�  r ��nGdfe<|ZgE� r ª�o([ � [KY(eh[�o(� } r §¡XZeh�¤|��j[KXZ\�VQz r ���I_7[�\î�hb r�(ehX�p r ghg7X7§C|��E�hej[KY(o��h[�\( í�jb r �hb r X&e r �j[�p�| ��� dèp�| � p�o � |s� r }¬Y>|Z\>}(g�jX��jb r#r �f� r eh[K� r \��h| � XZ\ r g�_IY^X��hbv�hb r gE[K�¤[ � |�eh[ �*d�X7§��jb r p�X&eje r ¥gj�;X&\>}�[K\( z»l¼���½d¾A¿AÀ�ehX��h|��j[KXZ\>| � §¡e r ª�o r \;p�d��§p�o>ej� r g�|&gT� r���� |Zg�jb r �hb r X&e r �j[�p�| ��r �(p�[��h|��j[KXZ\ r \ r eh Z[ r g�|�\>}§�jb rmr ��� r eh[�� r \��<| ��^XZ�(o � |s�h[�X&\w[K\�� r \>gE[��j[ r g�|Ze r �h|Zi r \w[�\��hX�|&p�p�XZo(\��C|Zg�}�[�gjp�o>gjg r }Y r�� Xs� [K\¬} r �h|Z[ � Va�b r �>e r g r \&���>|Z� r e-[�g-XZeh &|Z\([ � r }9|&g�§¡X ��� Xs��g���u�\wXs� r eh�f[ r �

X'§��>e r ��[KXZo;g#gE�jo>}([ r g$X&\ë�jb r ]E�<]�a�Yí\fo>p �Kr o;g$[�g� Z[K� r \ë[K\�� r p�IV©E©V¬�fXZ� r } r �h|Z[ � g9e r�� |s� r }O�jX§�hb rër ��� r eh[�� r \��<| � g r � ¥ o(��|Ze r�(e r g r \�� r }m[�\è� r p�IV�©E©E©,|Z\>}w�jb r e r gEo � �<g�_&[�\>p � o;}�[�\> vgEX&� r�r � ¥|��¤� �Kr g�X7§;�hb r7r ��� r eh[�� r \&�<| � gj� r p�heh|�|�e r �(e r g r \�� r }w[K\ë� r p�IV©£« ´k�jb r p�XZehe r gE�^XZ\;}�[�\> ía�|ZY ��r g�X'§C�jb r X&Y��h|Z[�\ r }¬�heh|Z\>gE[��j[KXZ\

r \ r eh Z[ r gm|�e r  &[�� r \æ[K\æ�hb r u��(� r \;}�[ � µ VÛa�b r e r gEo � �hg5§¡ehXZ�p�| � p�o � |s�h[�X&\>g#e r gEo � �hg�|�\;}ë�jb r p�XZ�¤�>|�eh[�gEX&\ë�7[ �hb r ��� r eh[�� r \&�|Ze r  Z[K� r \è[K\¦� r p���VC«�©V

���A� ®Üôj® ¡��� @¥ ¦����M¥������E  £�� �M¢��5���!

a�b ræ�Kr � r�� gjp<b r � r X'§è]*�]�a�Y b>|ZgOY r�r \5} r � r eh�¤[�\ r }Q�jX� r ehd¬b([� &bOgj�([�\;g�|Z\>} r �(p�[��h|s�h[�X&\ r \ r eh Z[ r g5® " ° V{a�b r �jb r XZe r ¥�h[Kp�| � [K\�� r eh�(e r �<|s�j[KXZ\�X'§�[��hg{} r p�|`d¦�;|s�E� r eh\�|&gjgjX�p�[�|s� r }Ý�7[ �hb�hb r \(X&ej�ë| � ¥ ´Ü|Zg1XZ�(�^X&g r } �jX gEo(� r e µ ¥ } r §¡X&ej�ë|s�h[�X&\î[�\>}([ ¥p�|s� r g§|D Ze<|Z}�o;| � �je<|�\>gj[��j[KXZ\ §¡ejX&� |D\ r |Ze � d gj�(b r ej[�p�| � ¥ �jX|Z\ XZY � |s� r ¥ gEb;|�� r _��jb r p�| � p�o � |s� r }îXZY � |�� r } r §¡XZeh�ë|s�j[KXZ\ [K\ ¥p�e r |Zgj[�\>  g � Xs� � dQ�7[��jb r �(p�[��h|��j[KXZ\ r \ r ej &d |Z\>}5gj�([K\ §¡ehXZ�#%$'&�(�) ( "vo(���jX #%$*&�(+) ³ ( ® " ° Va�b r p�XZehe r gj�;X&\>}�[K\( 7\(XZ\ ¥ p�X �K��r p�j[K� r �heh|Z\>gj[ �h[�X&\>g�|Ze r g � Xs� r e

|&g3p�XZ�¤�>|�e r }è�hXë�jb r �*�#X1X��jb r e3 &ejX&o(�>g7X7§��je<|�\>gj[ �h[�X&\>g�g r�r \�*df�([�p�| ��� d [�\ �jb r \fo>p �Kr [¬[K\ �hb([Kgî�ë|&gjg eh|Z\(  r �!�jb r p�X � ¥�Kr p��j[K� r ehX��<|s�j[KXZ\;| � Y>|�\;}(g¦|ZghgjXfp�[K|�� r } �7[��jb �hb r �¤X�} r e<|s� rª�o>|&}�eho(�;X ��r } r §¡X&ej�ë|��j[KXZ\OY>o��{p<b>|�e<|Zp�� r eh[�g r }T_T|Zp�p�XZe<}�[K\( ë�jX�hb r p�| � p�o � |s�h[�X&\>g�_IYfd9|�e r�� |s�h[�� r�� d�gE�jehXZ\> 7�jeh[K|���[K| � [��*dZ_s|�\;}��jb rgjo(� r e<} r §¡X&ej� r }í�heh|Z\>gE[��j[KXZ\;g�Va�b r \fo>p ��r o>g�]E�<]�a�Y9b>|&gTY r�r \9X&\ r X'§��jb r ¬ e<g*��\fo>p ��r [Z[K\��jb r

u-, ¨ " ( �ë|Zghg�e r  &[�X&\§[�\¦�7b>[Kp<b§�ë|�\fd¦��n Y>|�\;}(g3[K\f�ZX � �f[K\( �>ejXZ�jXZ\ ¥ |�\;}B\ r o��hejX&\ ¥ b(X �Kr gv[�\��hb r ��n  �|��>g/.10 « « |�\;}230 ª7« b>|`� r Y r�r \DXZY>g r eh� r } ® « _ �-° VD�§XZe r Xs� r ev�jb r ¬ e<g*�X&Y>g r eh�`|��j[KXZ\§X7§$[K} r \��j[�p�| � gjo(� r e<} r §¡X&ej� r }§Y>|�\;}(g���|&g��ë|Z} r[K\��hb([Kgm\fo>p ��r o>gw´/® ª'°�µ V ©£\Û�jb r §¡X �K� Xs�7[�\( O� r p�XZ\;p r \��heh|�� r X&\�hb r ��n Y;|�\>}(g�_f�jb r [Ke��(ehXZ� r ej�j[ r g7|�\;}1[K\�� r eh�(e r �<|s�j[KXZ\�V

�����A�4�!5 67�V¢9��89�V i¡�� ��¦e£e i¤@�/¡]�G£e :�

a�b r a r ehY([Ko(� [�gjX��jX&� r g¬� r e r �>ejX�}�o>p r }Q�f[K|D�hb r ]E�E¢Ia r´Ü�j��u � _v��\ µ e r |Zp�h[�X&\5|s�¦�hb r Y r |Z� r \ r ej &d X'§ ¨ ";"î� r «vVu g*�<|Zp<i X7§¤�*�#Xþg r�� § ¥ gjo(�(�^XZej�j[K\(  ]E�E¢`a r _ r |Zp<b<,=" (>(9?  p��A@^���jb>[Kp<iw��|&g�o;g r }w�7[��jbm�hb r �j�Iu � Y r |�� �>ejXs�f[�} r }vY�dv�jb r«�[��f[��jehXZ\æ|&p�p r���r eh|��jX&e9X'§��jb r ©£\>gE�j[��jo��¤} r W r p<b r e<p<b r gw�fo(Y ¥|��jX&�m[�ª�o r gmX7§����heh|&gEY^XZo(eh >_#t(e<|�\>p r V a�b r ¥ eh|`d�} r p�|`d�gvX7§�hb r e r gj[K}�o;| � \fo>p �Kr [T� r e r � r |Zgjo(e r }1o>gE[K\( ¤�hb r �,o(ehXZY;| �K� ©£«|Zeje<|`dO�7b>[Kp<bDp�XZ\;gE[�g*� r }ÛX'§]¶ ( �h|Z� r e r }æ} r � r p��jX&ehgl´�§¡X&ej��|�e<}ª�o>|&}�e<|�\�� µ _�³ « p � Xs� r e�} r � r p��jXZe<ge´¿|ZejX&o(\>} © (>B µ |Z\>} ¨ "wp � o>g ¥� r e�} r � r p��jXZe<gE´¿Y>|Zp<if��|�e<}¬|�\(  ��r g µ V3u3ghgEX�p�[K|�� r }§�jXè|Z\§[�\>\ r eY;| �K� X7§$c�l{�?} r � r p�hXZe<g5´Y³ ¨ ( p�ehdfgE�h| � g µ _;�jb r dl§¡XZeh� r }¦|1} r ¥�f[�p r X'§ ¨+« ¸¦ &ejX&o(�>gwX'§C� r ª�o([K�`| ��r \����C} r � r p��jXZe<gw[�\Û� r eh�ëgvX7§gjX � [�}è|Z\(  �Kr |�\>} r �íp�[ r \;p�d ¥ | ��� Xs�7[K\( v�hXë� r |Zgjo(e r �hb r �vo � ¥�h[�� � [�p�[��*d�|Z\>}��jb r gEo(� r \ r eh Zd3X7§> ¥ eh|`d�g r �¤[��E� r }�[K\{|�\�o;p �Kr |�ee r |&p�h[�X&\�VuQp�XZ[K\>p�[K} r \>p r §¡X � }�g r���r p�j[KXZ\èX'§�|�� �Kr |&g*� « o(\>gjo(�(�(e r ghg r }´�¸ gjo(�(�(e r ghg r } µ l r } r � r p��jXZe<gO|Z\>} X7§ë|�� �Kr |&g*� ¨ ( c7l{�

Y;| �K�Or��Kr � r \&�<g ¬ ej[K\(  ��|Zg e r ª&o>[�e r } §¡X&e g r��Kr p�h[�\>  b([K Zb ¥�wo � �j[K� � [�p�[��*d r � r \��hg�V-a�b r e r�� |��j[K� r df[ r�� }(g,X7§y�jb r �¤|Z[�\ r �s|�� ¥X&eh|��j[KXZ\�p<b>|�\(\ r�� gC"s\�_ « \�|�\>} � \�|Ze rl¨ ¶ED1_ �;� D!|�\;} ¨ ( De r gj� r p�h[�� r�� dZV u§k� r e§x#X&�m�(�jXZ\þgjo(�(�>e r gjgj[�X&\þ|��hX��h| � df[ r�� }X7§ ª ) � � ¨ ( � §¡XZo>e ¥ §¡X � }í|�\;}ëb([K Zb r e ¥ §¡X � } r � r \��hg#��|Zg,X&Y��h|Z[�\ r }T_�Kr |&}�[K\( 9�jXm|{� r |Z\í�vo � �h[�� � [�p�[��*dë�`| � o r X'§�"(V�©£\ë�jb r |�\;| � dfgj[�gX7§,�jb r }>|s�h|�g r �9|1\(X&\>gj�([�i r }Ý}(|s�<|�Y>|&g r ® ©'° b;|Zg�Y r�r \�o>g r }TVa�b r g r |Zehp<b §¡X&e�\ r � �(n Y>|�\>}>g#[K\¬a�Yè[�gEXZ�jX&� r g$��|Zg�p�|Zejeh[ r }

Page 4: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

XZo(�vo>gj[�\( ¦|Z\�|�o��hXZ�ë|s�h[Kpëg r |Zehp<bBp�X�} r ® ¨ ( ° �7b([�p<b�e r ª&o>[�e r g�jb>e r�r X'§D§¡XZo>e3 &|�� r g7�jX1Y r gh|s�h[Kg ¬ r }¬Y r §¡XZe r [K} r \��j[j§¡df[�\( èe r   ¥o � |�e�g r ª�o r \>p r g�X'§ ¥ eh|`d¤�heh|Z\>gE[��j[KXZ\;g�V

� �r� ¢C�7��¥ �¡-�©£\1�hb r �(e r g r \���}>|s�h|mg r ��_;}�o r �jXm�jb r � r ehdëb([K Zb¬g*�<|s�j[�gE�j[�p�g

|�\;}1|�\è[��¤�(ehXs� r }ë� r |�i ¥ �jX ¥ Y>|&p<if ZehXZo(\>}me<|s�h[�X;_�|v�jXZ�h| � X7§ ¨ "��nîY>|Z\>}(g-b>|&g�Y r�r \wX&Y>g r ej� r }TV�u��>|ZeE�d§¡ejX&� �jb r�r [� &b&��Y>|Z\>}(g�(e r �f[KXZo>g � d¤|Zghgj[� &\ r }m�hX¤]E�<]�a�Y1|�\;}¤�*�#X¤��nQY>|�\;}(g#|&gjgj[K Z\ r }�jXí]E�j��a�Y�_P® ¨ ¨�° _ ¬ � r \ r � �(n Y;|�\>}(g�� r e r p ��r |�e � d¤[�} r \��j[ ¬ r }TVa�b r g r |�e<p<b[§¡XZew\ r � ��n g*�hejo;p�jo>e r g9[�\æ�jb r g r a�Y�\fo>p ��r [

�jo>ej\ r }¤XZo��$�jX9Y r |9} r�� [�p�|�� r �<|Zgjiwgj[�\>p r g r � r eh| � §¿|Zp�hXZe<g,p�X&\ ¥�jeh[KY(o�� r }è�jX¤� r p<b(\([�p�| � |�\>} � XZe��(e<|Zp��j[�p�| � }�[��íp�o � �j[ r g��

� a�b r Xs� r e<| �K� � r |�ië�^XZ�(o � |��j[KXZ\¬X'§��jb r ��n5Y>|�\>}>gA²� x#XZ�¤� r �j[��j[KXZ\/�7[ �hb � Xs� ¥ � df[�\(  ��n Y>|�\;}(g �jb>|��î|Ze r�jb r e r §¡XZe r �;X&�(o � |s� r }9�7[��jb{gE�jehXZ\(  r e��������� �¾���[K\�� r \>gE[��*dy²

� a�b r �(e r g r \;p r _��7[��jb([K\ÛX&\ r gj[K\(  �Kr \fo>p ��r o>g�_CX7§��ë|�\fd��nþY>|Z\>}(gC�7[��jbígj[K�m[ � |�eV»~¼K�/½-Y r b>|`�f[KXZo(e,|Z\>}¤Xs� r e � |�� ¥�([�\> mXs� r e � XZ\( ëgE�je r �hp<b r g�X'§-ejXZ�h|��j[KXZ\>| � §¡e r ª�o r \>p�[ r g)²

� a�b r �(e r g r \>p r X'§{gjXZ� r ��nÆY>|�\;}(gí�7[��jb \(XÛe r  Zo � |�eY r b>|`�f[�X&o(e�X'§��hb r [Ke]»t¼��/½$�¤XZ� r \��hg�V

©��m�jb r \g§¡X �K� Xs��g{�hb>|s�¤p�XZ\;gE[�} r e<|�Y ��rèr ºyXZej�hgw� r e r \ r p r gjgh|�ehd§¡XZev�jb r1r �f� r \>gE[KXZ\�X7§ r ��� r ej[K� r \��h| � if\(Xs� �Kr }�  r X'§7� r��K�$r g ¥�h|ZY � [Kgjb r }¤��n Y>|�\>}>g�o(�v�hX��jb r b>[� &b r gE�CXZY>g r eh�s|�Y �Kr §¡e r ª�o r \ ¥p�[ r g�_ r gE� r p�[K| ��� d¦[K\B�jb r § r�r }�[K\( §e r  &[�X&\�p � X�g r �jX¬�hb r ¬ ghgE[KXZ\� [��¤[���Vu p�|�e r §¡o � _�p�XZ�¤� �Kr � r \��h|Zejdw|�\>| � d�gj[Kg�b>|Zg�Y r�r \¤� r e0§¡X&ej� r }

o>gj[�\> Û|�\ r � Y;|Zp<if ZehXZo(\;} gjo(Y��heh|&p�j[KXZ\ � r �jb(X�}{® ¨ ³ ° V5c�do>gj[�\> wY>|&p<if ZehXZo(\>}ëgj� r p�heh|w� r ejd¤e r �(e r g r \��<|s�j[K� r X'§��hb(X&g r [�\p�X&[�\;p�[�} r \>p r �7[��jbí��nîY;|�\>}(g-� r gEo>p�p r�r } r }{[K\wi r�r �>[�\( ��ë|s� ¥[K�vo(� g*�<|s�j[�gE�j[�p�g�[K\§�(n � r |�i�g�Va�b r ¥ e<|`d¤�je<|�\>gj[ �h[�X&\ r \ r eh Z[ r g�X7§��hb r � r \O��n Y>|Z\>}(g�_ � | ¥

Y r��K��r }v§¡ehXZ� ¨ �hX ¨ ( [�\��jb r ]*�]a�Y§p�|&g r _�|�\>} ¨ �jX "w[�\è�jb;|s�X'§{]*�h�Ia�Y�_#|Ze r¬� [KgE� r }Û[K\ a�|ZY ��r gm©E©E©_�©£«!«G|�\;}Û«�©w[K\Û�hb ru��>� r \>}�[��yV,a�b r \ r �Q�(n Y>|�\>}>g�|Ze r�� |�Y r��K��r } © |�\>} ¨ ( |�\>}¨ �hX~¶1[�\�]*�]a�Y�|�\>}�]*�h��a�Y�_^e r gj� r p�h[�� r�� dZV�a�b r \ r �* ¥ eh|`dr \ r eh Z[ r g�XZY;g r ej� r }Ý[�\��jb>[Kg r ��� r ej[K� r \��w|�\;}�| � gjX��jb rër \ r e ¥ Z[ r g#X'§�| �K� �jb r Y>|�\;}í� r �wY r ehg�| � e r |Z}(dmif\(Xs�7\1[�\¦]*�]� ]*�h��a�Y\fo>p �Kr [�|�e r [K\>p � o>} r }�[�\��jb r a�|ZY ��r g�Va�b r gj� r p�je<|îX'§m�jb r \ r �ñ��n Y>|�\;}(g¦|�e r }�[�gE� � |`d r } [�\

t-[� ;V ¨ V-a�b r b([� &b r gE� r \ r ej &d9�>|�ej�hg-X'§>�jb r ]E�<]�a�Y�´ ¨ ¥ ª�µ Y;|�\>}(g�_�7b r e r �jb r \ r � �je<|�\>gj[��j[KXZ\>g�|�e r p �Kr |Ze � dëg r�r \�_�|Ze r �(e r g r \�� r }[K\¬t-[K >V�³(V

�v� ¦�� �D¦]¥ ����¡]�G£e :�%�E i¤ ¦e£-896 �E¢9� �y£e  ��¡�� � 5 67�M¢9��8 �M i¡

���jeho>p�ho(e r g¬X'§¤| �K� ��n Y>|Z\>}(g¬[K\ ]E�<]� ]E�j��a�YQ\fo>p ��r [9b>|`� rY r�r \!|�\;| � d � r } o>gE[K\( ?�jb r ��XfX�}(g ¥ ��|��fX&\ x#e<|�\(if[K\( ?|Z� ¥�(ehX&|&p<bO�7[��jb��jb r � o(\([K� r ehgh| � �T�>|Zeh|Z� r � r e�g r �I_V´Üg r�r W r §*VV® ¸ ° _|�\;}¬e r § r e r \>p r g��hb r e r [K\ µ V�n r �<|�[ ��r }§p�| � p�o � |��j[KXZ\>g3gEb(Xs� �jb;|s��jb r�r ª�o([ � [KY(ej[Ko(� } r §¡XZeh�ë|s�h[�X&\>g¤} r � r \>}DgjXZ� r �7b>|��ëXZ\æ�hb r

�;|�ej�j[�p �Kr ¥ b(X �Kr p�XZ\ ¬  &o(e<|s�j[KXZ\OX'§$�hb r �>|�ej�j[�p�o � |Ze9�(n Y>|�\>}Ý[K\ª�o r g*�h[�X&\�VC� [��jb�[�\;p�e r |Zgj[K\( 1ehX��<|s�j[KXZ\;| � §¡e r ª&o r \>p�dZ_T�¤X&gE��X7§�hb r \fo>p ��r [&gjb(ej[K\(i�[ÜV r V��jb r p�X&eje r gj�;X&\>}�[K\( 7ª�o>|Z}�eho(�^X �Kr } r §¡X&e ¥�ë|��j[KXZ\ # � } r p�e r |Zg r g�V�u g � [� &b����¤X�}�[ ¬ p�|s�h[�X&\{[K\{�jb r b r ��|&} r ¥p�|��^X �Kr } r §¡X&ej�ë|s�h[�X&\ # � |Zp�p�XZ�¤�>|Z\([ r gw�jb([�g r �&X � o��j[KXZ\�_$Y(o���hb r g r |Ze rCr gjg r \��j[�| �K� d�| ��� �jb r gjd�g*� r �ë|s�h[Kp$gEb>|Z� r p<b>|�\(  r gy�hb>|s�|Ze r [K\>}�o>p r }�YfdíejXZ�h|��j[KXZ\�V�©£\��>|�ej�j[�p�o � |�e��hb r �jeh[K|���[K| � [��*dë�>| ¥e<|�� r � r e þe r �ë|�[K\>g¤p � X&g r �hX � r ehXs§¡X&e¤�mX�g*�ëX7§��jb r Y>|Z\>}(g[K\§�hb r \fo>p ��r [��hb>|s�9|�e r p � X&g r \ r [� &bfY;X&ehg3X'§C�jb r ��n }�X&o(Y � d ¥�ë|Z Z[�p9]E�h��n�d1\fo>p �Kr o;g�V©£\¦�hb r §¡X �K� Xs�7[K\( ¬p�| � p�o � |��j[KXZ\>g�_y� r o>g r }O�jb r gjb>|�� r g�|�\;}

gjb>|Z� r{r �ZX � o��h[�X&\t§¡XZe3�jb rwr � r \ ¥ r � r \§\fo>p �Kr [�|Zg��h|ZY(o � |s� r }§[K\W r §*VV® ¨ ¶ ° V§u �*df�([�p�| � |`� r eh|Z  r } r §¡X&ej�ë|s�h[�X&\�p�XZehe r gj�;X&\>}�[K\( �hX1�hb r ]*�h��n�d¦\fo>p ��r o>g�b>|Zg�Y r�r \Bg r���r p� r }t§¡X&e��jb r ehXZo��hb([K|Z\}([K|Z Ze<|��ëgv[K\ît�[K &g�V´�¶ µ |�\>} ´\¸ µ �hb>|s�ë�7[ ��� Y r o>g r }D|Zgw�jb re r § r e r \>p r �7b r \í}�[�ghp�o>ghgE[K\( 9�hb r �>|�ej�j[�p �Kr ¥ b(X �Kr7r �(p�[ �<|s�j[KXZ\;g$| ¥\;| � dfg r }èY r�� Xs�9V� r o>g r �jb r o>gjo>| � \(X��<|s�j[KXZ\ëe r�� |s� r }m�hX9�jb r X�p�p�o>�>|s�h[�X&\mX7§

�hb r gj� r p�[�| � _>[K\��jeho>} r e3XZehY([ �<| � g�_>[ÜV r V��jb>X&g r p<b>|�e<|Zp�� r ej[�g r }íYfd2 0 « §¡X&e��jb r �(ehX��jX&\>g3|Z\>} 2 0 � §¡XZe3�jb r \ r o��hejX&\>g�V�t(XZe[K\>gE�h|Z\>p r _�p�XZ\ ¬  Zo(e<|s�h[�X&\Op�X&eje r gj�^XZ\>}�[K\( ë�hX��jb r X�p�p�o(�>|s�h[�X&\X7§��*��X¤�(ehX��jX&\ ¥ [�\��jeho>} r e ��r � r�� g7|Z\>}è�jb(e r�r \ r o��hejX&\ ¥ [K\��jeho>} r e�Kr � r�� gv�7[ �K� Y r } r \(XZ� r }��������&V�t(X&ev�hb r } r �h|Z[ �Kr }æe r § r e r \>p re r�� |s� r }{�jX��jb r gj[�\(  ��r ¥ �;|�ej�j[�p �Kr ehXZo��hb([K|Z\>g�_`�jb r z�[ � gjgjXZ\ � |ZY r�� ggjb(Xs�7\�[�\¬t-[� �g�V�´�¶ µ |Z\>} ´\¸ µ �7[ �K� Y r o>g r }�Vu3p�p�X&eh}�[K\( ��jX��jb r gjX ¥ §¿|�eTo(\ r ��� � |�[K\ r } � �mX&� r \�� ¥ X'§ ¥ [�\ r ej�j[�|

|Z\(XZ�ë| � d ��}�[�ghp�o>ghg r }�[K\ÛW r §*VN® ¨ ¸ ° _��jb r »l¼���½��¤XZ� r \��<gvp�| � ¥p�o � |s� r }¬o>gj[�\( í�jb r ��XfX�}(g ¥ ��|��fX&\¬� r |�\ ¥ ¬ r�� }¬�^X�� r \��j[�| � |�e rX&\O�hb r |`� r e<|�  r , ¨ ( D � |Zej  r e��jb>|Z\��jb rër �f� r eh[K� r \��h| � �`| � ¥

�yW��]^7�+�±C ��13F 2c�j a`+�A�����.4$F��Gb��$�0�}4$H�8�>?13=�`}��H��w=���> ��f7bG1L�����D����"�)=�� 4�13=@��H �N='!�bG23�G1 ®Üôj® CD� �)=�� ®Üô£Ù CD� ^

Page 5: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

¸

Energy [0.5 keV / channel]

Band 1 Band 2

Band 3 Band 4

Band 5 Band 6

Band 7 Band 8

Num

ber

of

counts

15

89

.1

16

42

.6 15

44

.1

15

94

.2

15

55

.8

16

04

.3 14

94

.3

15

58

.0

15

53

.9

15

18

.9

15

58

.5

14

89

.3

15

45

.0

15

17

.3

�yW��]^m_� CDH��BH�13`+H �G46�g�G=��/��`)# F"���$� 8):}�78+! ��23���A="� �$��1cF 23�h `-�������r4$F��Gb��$�0�K4$H�8�>?13=�`E��H��=���> Zf \�0��#5�$�0�)= 4$13��138)=�4N8)��4$����q-�G�r13=®Üôj® CD� � �j a*-,/^�CDH���= ��> �$�0�)= 4$13��138)=�4V�A���N2c�)����2c23���i�_#K��H �G1L�?�G=�����`A#_^

o r g@´¿b r e r � r |Z}>}�e r gjg3�jb r o>\>|��wY([� &XZo>g�p�XZ\>p � o>gj[KXZ\>g�Y>|Zg r }XZ\þ�jb r p�X&�m�;|�eh[KgjXZ\îX'§9�hb r e r  Zo � |�e�p�o(eh� r g�_7[ÒV r V \>X��1�hb rXZ\ r gæ�^X&ghgj[�Y � d � p�XZ\��h|Z�m[K\>|�� r }��vYfd?�jb r Y>|�\>} p�ejX�gjgj[K\( &g µ Va�b r g r�� § ¥ p�X&\>gE[�gE� r \��]¹�|�ej�je r�r ¥ t>Xfp<i�e r gjo � �<g��(ehX�}�o>p r |1gj[K�m[ ¥� |�e�|�\(X&�¤| � d&_`�7[ �hbv�hb r } r �f[K|��j[KXZ\>g��hb>|s�C|�e r g � [K Zb�� � d9gj�¤| ���Kr eI_� ¥ ª D1V��f[K\>p r �hb([�g�gEd�gE� r �¤|��j[�p9} r �f[�|s�h[�X&\¬|Z�(� � [ r g�[�\¦|ëgj[K�m[ ¥� |�ed§¿|Zgjb([KXZ\w�jX9| �K� �jb r Y>|Z\>}(g�gE�jo>}�[ r }�_Z[��,b>|Zg-Y r�r \¤gjo( Z  r gE� r }® ¨ ¸ ° �jX§[K\&�hejX�}�o;p r |§e r }�o;p�j[KXZ\[§¿|&p�jX&e�� 0 (�) © ²��jb r p�X&eje r ¥gj�;X&\>}�[K\( wp�XZ�¤�¤XZ\íe r \(X&ej�ë| � [�gj|��j[KXZ\í|Z�(� � [ r }¤�jX¤| �K� �hb r p�| � ¥p�o � |�� r }è�¤XZ� r \��<gN§¿|Zp�[ � [ �<|s� r g��jb r9��r  Z[KY([ � [��*díX'§�p�XZ�¤�>|Zej[�gjXZ\>g´¡[ �K� o>gE�je<|s�h[�X&\>g µ |Z\>}�b>|Zg�Y r�r \§|��(� � [ r }�| � gEX¤Y r�� Xs�9V

� � 6���������.¦�� ������������������

u ª�o>|&}�eho(�;X ��r �¤XZ� r \��¤X'§ ¨ � ) ³ r Y�_]® ¨ " ° _#b>|ZgmY r�r \D|�� ¥�jeh[KY(o�� r }þ�hXÛ�hb r ]*�] a�Y dfeh|&g*�¦��n Y>|Z\>}TV a�b([�g�� r |Zgjo(e r ¥� r \��,p�X&\ ¬ eh�¤g�p ��r |�e � d��hb r gEo(� r e<} r §¡XZeh� r }vp<b>|Zeh|&p� r e-X'§>�hb ro(\>} r e � df[K\( O\fo>p ��r |�ewp�XZ\ ¬  Zo(e<|s�h[�X&\�VOu3p�p�X&eh}�[K\( §�hX¦�hb r |&p ¥p r ��� r }�[�\�� r eh�(e r �h|��j[KXZ\�_�[ �<g�gE�jeho>p�ho(e r [�gTY>|&g r }�XZ\��jb r � « ��� � �p�X&\ ¬  &o(eh|��j[KXZ\Ý[�\�� r ej�ëg�X7§�b([K Zb ¥ z?[K\&�hejo;} r e9X&ejY([��h| � g�Vëa�b rp�X&eje r gj�^XZ\>}�[K\(  r ��� � [Kp�[ ��z�[ � ghgEX&\ � |ZY r�� gíp�|�\îY r e r |Z}B§¡ejX&�t-[� ;VP´�¶ µ �d§¡XZe��jb r �(ejXZ�jX&\>g,�hb r dè|�e r ��� «7« ( ¨�� ³�� ��!#" ]%$h� _(|�\>}��� « " ¨ ¶ � ³�� ��! @T]%$h� V$�f[��¤[ � |Ze � dZ_(�jb r \ r o��jehXZ\�[K\&�hejo;} r e � |�Y r�� gp�|Z\èY r e r |Z}v§¡ehXZ� t-[K >V�´�¸ µ ���hb r d�|�e r �&� �;� ( ¨�� ³'�%�'!#" ] $h� Va�b r1� |�Y r�� g ³�_?¶O|Z\>} ¸�|ZghgEX�p�[�|s� r }B�7[��jbÛ�jb r ¬ ehgE�m�jb(e r�rr �(p�[ � r }BY>|Z\>}(g{e r�(;r p�v�jb r } r p�e r |&gE[K\( §e r�� |s�h[�� r �;X&�(o � |s�j[KXZ\

�yW��]^I�7���'13=�`+23�h �F7��8)��8+=h�G=�����`A#h23�Gq+�G234�8)� �0�)13= ���z>?1L��He��H��*)l8_8'� 4� � �Af78)=tF�8)���G=_��1c�)2��A4]:¯!�=�b/��1c8)=�4]8):?��8)�0����1c8)="�A2?:j����k_!��G= b�#v:I8)�K� �h :I8)��J9����138+=vF"�A�0�AJK��������4Vb/H��A�0�)b/������1346��1cbh8):d��H �z#'�0�A46���Z� �"�A="� 13=®Üô£Ù �M#w�)="�v1L��4zb�2c8)4$�G46�]=��G13`+H'��8A��4G^&)l�e! 4$�e��H��e46�0�A="�����0�w= 8)�0�� ��1c8)=w:¯8)���H��eF��A��1L�Y#_& +P&y�A="�v:¯8)���H��h4$1c`)="����! ���K��f7F�8+= �G=_�-,d^9Wa=F"�A�$��13bG! 2c�A��&7��H��M4$8)231j�52c13= �G4D���GF ����4$�G=_�D��H��N8A����1L�0�)234D>?1L��H � +/.0,P, n�21 . 1 ��3�+,%4S��H�� �78)�$�����[2313=���49��H 8+4$�i>?1L��H � +/.2,P, n �21 . 5���3I),%4��H��v4$H�8)�$�£ a� �)4$H��G�.2313=��G4i��H 8+4$�v>?13��H � +/.0,P, n � 56. 5���3�+,%4z��H��2c8)=�`� Y� �)4$H ���t2c13= �G4h��H�8)4$�5>?1L��H � +#.7,P, n � 56. 1 ��3I),/^§�N��:¯8)��J9�� ��1c8)=iF"���0�)JK�����/��4G��8 Ù n ('9 o �)&�8 ò n ('9à�I�)^

�yW��]^;: � �713=�`)2c�j a= �G! �$��8)= �G= ����`)#�23�Gq-�G234.8+�7�0�)13=���� >?13��H���H��)l8_8'� 4� Ò�7�Af78+=wF�8)���G=_��1c�)2��)4�:¯!�=�b/��1c8)=�48):d��8)�0�A��138)="�)2P:¯���Gk'! �G=�b/#<4:I8)�?:¯! �$��H��/�M�7���0�)13234?4$�G�b��)F7��138+= �y13` ^ � �-,/^

[K\�� r \>gE[��*dZV a�b r [�\�� r eh�(e r �h|��j[KXZ\þX7§9�jb r e r�� |�� r }þp�X&\ ¬  Zo>eh| ¥�h[�X&\>gv|&p�p r ��� r }BYfdÝg r � r e<| � |Zo��jb(X&ehg{[Kg{�jb>|��vX'§��jb r1� Xs� r g*� ¥� df[�\> §�(ejXZ�jX&\��;|�ej�j[�p �Kr ¥ b(X �Krër �(p�[��h|��j[KXZ\>gv´¿p�§*V r V  ;V[® ¨ ¸ ° |�\;}e r § r e r \>p r g7ª�o(X�� r }è�jb r e r [�\ µ VV¹ r e r �jb r gE�jeho>p��jo(e r g�X7§-Y>|Z\>}(g]E�]a�Y�´Y³ ¥ ¸ µ b>|`� r Y r�r \�e r ¥ |Z\>| � d � r }¬�h|Zi�[K\( �[�\��hX¬|&p�p�XZo(\��9|�¤X&e r p�X&�¤� ��r � r�r ��� r eh[�� r \&�<| � [K\�§¡XZeh�ë|s�h[�X&\�Va�b r�r ��� r eh[�� r \&�<| � |�\;}ë�jb r XZe r �h[Kp�| � }�df\>|Z�m[�p�| � �mX&� r \��hg»l¼��/½�X'§��hb r ��n ¥ Y>|Z\>}(gN´ ¨ ¥ ¸ µ |�e r � � XZ�E� r }{[K\mt-[K >V"´ " µ |&gP§¡o>\>p ¥

�h[�X&\>g9X7§�ehX��<|s�j[KXZ\;| � §¡e r ª�o r \;p�dZVèu3g9�hb([�g9�#X&ejiOb>|Zg{| ��� Xs� r }�hb r [K} r \��j[ ¬ p�|��j[KXZ\æX7§�\ r � ¥ eh|`dO�je<|�\>gj[ �h[�X&\>gm|s�w� r ehdÝb>[� &b§¡e r ª�o r \>p�[ r gë|Z\>}D|Ýb>[� &b r e¤�(e r p�[Kgj[�X&\ [K\ �jb r � r |&gEo>e r � r \��X7§;�hb r �(n ¥ e<|`d9�je<|�\;gE[��j[KXZ\ ¥ r \ r eh Z[ r g-�7[ �hbë� r |�iw[�\�� r \>gj[ �h[ r g�_� r � r e r |ZY ��r �hX r �f�je<|Zp��C|&p�p�o(eh|�� r �s| � o r g�X7§y}(d�\;|��¤[Kp�| � �¤X ¥� r \&�<g#|Z\>}ë�hXvX&Y>g r ej� r �jb r [Ke#Y r b>|`�f[KXZo(e�|��(�>ejX�|Zp<b([K\( {p � X&g r e

Page 6: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

"

�jX¦�jb r ¬ gjgj[�X&\ � [K�¤[ �IV¬�¦Xf}([ ¬ p�|s�h[�X&\>g9[K\B�jb r gj�¤XfX��jb��s|Zej[�| ¥�j[KXZ\1X'§�»l¼���½C|s�#� r ehdmb([� &b��ægEb>XZo � }¤e r (>r p��$�hb r p�ejX�gjgj[�\> &g�X'§�jb r Y;|�\>}(g-�(e r }([Kp�� r }wYfd9�jb r XZehdZV-a�b r g r p�ehX&ghgE[K\( &g-|��>� r |�eC|s��jb r §¡e r ª�o r \>p�[ r g-p�X&eje r gj�^XZ\>}�[K\( 7�hX3�hb r p � X&gj[�\> 3o(�w�jb r �ë|� &[Kp &|Z�>g{|��{�jb r b([K Zb r g*�9§¡e r ª�o r \>p�d � [��¤[��m|Zgw}�[�gjp�o>gjg r }�|ZY;Xs� r V��Y>g r eh�s|s�j[KXZ\ X7§vgEo;p<b r º r p��hgè[�\ �jb r�r ��� r eh[�� r \���[��¤�^X&g r g\ r � p�XZ\;g*�heh|Z[�\��hg{XZ\B�jb r �^X&ghgE[KY �Kr �>|ZeE�h[Kp ��r ¥ b(X ��r p�XZ\ ¬  Zo(e<| ¥�j[KXZ\;g�o(\>} r e � df[�\( m�hb r } r ghp�eh[K���j[KXZ\�X'§-�jb(X�g r ��n5Y>|�\>}>g

������������ ���������� a�b rír ��� r ej[K� r \��h| � e r gEo � �<ge§¡XZe9�hb rdfeh|&g*�íY;|�\>}T_ ]E�<] a�Y�´ ¨+µ _7[K\>}�[�p�|�� r �hb>|s�1�jb r » ¼���½ �¤X&� r \��hggjb(Xs� |�e r  Zo � |Ze�} r p�e r |&g r �7[ �hb[§¡e r ª&o r \>p�d¦o(���jX��jb r b([� &b ¥r gE�3X&Y>g r ej� r }è�s| � o r g7X7§��>� , (+) ª � r «5�7[��jb�_^\ r � r ej�jb r��Kr ghg�_gjXZ� r ( o>p��jo>|��j[KXZ\>gm|s�v�jb r�r \>}æX'§��jb r Y>|�\;}TVÝa�b r �jb r XZe r ¥�j[�p�| � e r gjo � �hge§¡X&e@»~¼���½��¤XZ� r \��hgvY>|Zg r }�X&\B�jb r � « ��� � �ë[K\ ¥�jeho>} r e�p�XZ\ ¬  &o(e<|s�j[KXZ\�[K\>}�[�p�|s� r |ígE�jehXZ\( í}([Kghp�X&\&�h[�\fo([��*d¬|s��|� r ejd�b([K Zb¦ehX��<|s�h[�X&\>| � §¡e r ª�o r \>p�d ´��>� , (+) ª ( � r « µ p�|�o>g r }YfdQ�jb r [K\&� r e<|Zp��j[KXZ\ Y r �*� r�r \ �jb r ��� ¶ ( ¨?¨ � ³�� ��! @T]%$h� |�\>}��� �>� ( ¨ � ³�� ��! @T]%$h� X&ejY>[ �<| � g�_9�f[�gE[KY �Kr §¡ejX&� t-[K >VE´a¶ µ V �3\ ¥§¡XZej�jo>\>|s� r�� dZ_$\>X�b>[� &b r e@§¡e r ª�o r \;p�[ r gw�jb>|Z\��>�10 (�) ª � r «b>|`� r Y r�r \DX&Y>g r eh� r }�_#gjo( Z  r gE�j[K\(  r [ �hb r eí|��^X&ghgE[KY �Kr p � X&g r ¥\ r gjg#X'§��hb r ¬ gjgj[�X&\ � [��¤[���X&e$�hb>|s���jb r gE�jehXZ\( vp�ejX�gjgj[K\( {X'§T�hb rY>|Z\>}(g�}�X r g�[�\>} r�r }è�<|�i r � � |&p r |s�7�hb r �(e r }�[�p� r }w§¡e r ª�o r \>p�d[K\��7b>[Kp<b¬p�|&g r |�\ r �f�heh| � X&ghg#X7§-�^XZ�>o � |��j[KXZ\�[�\�� r \>gj[ �*d�p�X&o � }Y r�r �f� r p�� r }TVCa�b([Kg�[�g$Y r p�|�o>g r [K\1gjo>p<b1|wp�|Zg r �hb r p � X&g r \ r gjgX'§��jb r �*�#Xmp�ehX&ghgE[K\( 9Y>|Z\>}(g�[K�m� � [ r g�|vp�XZ�¤� r �j[��j[KXZ\è[�\1� r ej�ëgX'§-|v &[�� r \ § r�r }�[K\(  ( o��ë�jb;|s��[Kg�[K\�gjo>p<b1|mp�|&g r gE� � [��E� r }1[K\��jX�*��X>_��7[��jb¬b>| � §-�jb r [K\�� r \;gE[��*d r |&p<b�V

Rotational Frequency

Band 1 Band 2

Band 3 Band 4

Dyn

amic

al M

omen

ts

�yW��]^N%'� ��f7F�����13JK�G=_�0�)2�)=�� b��A2cb�!�2c�A����� �7#7="�AJK1cbG�)2JK8+JK�G=_��4��� Ù�� � � Ù�! �GX#" ® ,��)4�:I! =�b���138)=�4?8):y��8A�0�A��138+=��)2<:j����k_!��G= b�# � ! �GXN,:I8A�e��H��9F7��8)��8+=}��f7bG1L�����O��� ���)=�� 4h13= ®Üôj® CD� ^lCDH��E!�=�� ����2L#713=�`F"���$��13bG23�h �H�8+23�bG8)= x"`)! �0����1c8)=�4S�A����7134$F�2c�G#_���@13=iC<�)��23�W/^

������� ���� ����%$&���Ga�b r � r |Zgjo(e r }¤[K\&� r \>gj[��*dwX7§T�jb r ¬ e<g*�r �(p�[ � r }þ��n Y>|�\>}�_�]*�]a�Y�´Y³ µ _7e r�� |��j[K� r �jX��hb r dfe<|ZgE�¤Y;|�\>}[�g $ ³ © ´a¶ µ D1V5a�b([�g1gE�jehXZ\>  � d gjo( Z  r gE�hg¤�hb>|s�¬|s�í�hb r b([K Zbgj�([�\ë�7[K\>}�Xs�î�7b r e r �hb([�g,Y>|Z\>}¤[Kg$�;X&�(o � |s� r }¤[��#p�X&eje r gj�;X&\>}(g

�¤X�g*� � [Ki r�� dm�jXv�jb r g r p�X&\>} r ��p�[ � r }1ejX&o��jb([�|�\�V-t>ejX&�?[K\>gj� r p ¥�h[�X&\�X'§7t-[� �g�VM´�¶ ¥ ¸ µ [��9§¡X ��� Xs��g��jb;|s�{�hb r e r |�e r g r � r eh| � �;X�g ¥gj[KY ��r p�|�\>}�[�}(|�� r ¥ p�X&\ ¬  &o(eh|��j[KXZ\>g��^X&ghgE[KY �Kr V¤©£\�W r §*VS® ¨ ¸ ° [ �b;|Zg9Y r�r \æ�(ehXZ�^X&g r }Ý�jb>|��{�jb r o(\>} r e � df[�\> Og*�hejo;p�jo>e r p�XZehe r ¥gj�^XZ\>}(g��hXm�jb r ��� ¶ ( ¨?¨ � ³�� ��! @T]%$h� �(ehX��hXZ\1b>X �Kr [K\��jb r dfe<|ZgE��(n!Y>|�\>}ÛX'§�]E�h��n�dZVÛ©£\Û�jb>|��íp�|Zg r _,|&p�p�XZe<}�[�\> ¦�jXBt-[� ;V�´�¶ µ\>X{�ë|�\([j§ r gE�h|��j[KXZ\íX7§^�hb r p�ejX�gjgj[K\( 9Y r �*� r�r \ë�hb r |ZY;Xs� r � r \ ¥�h[�X&\(\ r }¤XZehY([ �<| � g���� ¶ ( ¨S¨�� ³�� ��! @T]%$h� |�\>} ��� �;� ( ¨�� ³�� ��! @T]%$h�[�g r ��� r p�� r }�V

�'���(�)��*�� +�,�%-&�.� a�b>[Kg1Y>|�\>}î[�gë�^XZ�(o � |�� r }î�7[��jb |e r�� |s�h[�� r [K\&� r \>gj[��*d X'§@³'¸ ´a³ µ D1_3| �s| � o r � r ehdîp � X�g r �jX �jb rX&\ r §¡XZeOY>|�\>} ]E�]a�Y�´Y³ µ V a�b([�gOgj[��¤[ � |Zej[��*d gjo( &  r gE�hg��hb>|s��hb r �*�#X Y>|Z\>}(g�p�XZo � } Y r gE[K Z\;|s�jo>e r �>|�ej�j\ r e<g�_¤�(ehXs�f[K} r }�hb>|s� �hb r o(\>} r e � df[�\(  gj[�\>  �Kr ¥ �>|�ej�j[�p �Kr ehXZo��hb([�|�\ ¥ �>|�ej�j\ r e<g}(X \(X�� �ë|�\([j§ r gE� |Z\�d }�e<|��ë|s�h[Kp gE[K Z\>|��jo(e r gj� � [ �j�j[K\( >Vx#X&\>p r ej\>[�\( /�jb r »l¼���½þ�¤XZ� r \&�5X7§þ]E�]a�Y�´a¶ µ �7[��jb �jb rgjo( &  r gE� r }�� « � ´ � « " ¨ ¶ � ³'�%�'!0/ ] $h� µ @T]�� � �§p�XZ\ ¬  &o(e<|s�j[KXZ\ ® ¨ ¸ °|¤gj�¤X�XZ�jb�ej[�g r [�g7p �Kr |Ze � dë[K} r \��j[ ¬ r }¬|ZY;Xs� r �>� , (+) « "v� r «E²�hb([�g¤�>|s�j� r eh\D[Kg r �f� � |Z[�\ r }æYfd��hb r¬r ��� r p� r }Dp�ehX&ghgE[K\( 21*o>g*�� r \&�h[�X&\ r }[® p�§*V$| � gjXmt-[K >V�´a¶ µ$° V

�'���(� �3�� ����546���Ac�|�\>}i¸ve r�� |��j[K� r [K\&� r \>gj[��*dw[�g ¨ ¶�´a³ µ DVB©£\ÛW r §*V® ¨ ¸ ° [ �¤b>|&gvY r�r \ gjb(Xs�7\��jb;|s� r ��� r ej[K� r \��h| � e r ¥gjo � �hgi§¡X&eíY>|Z\>}(gv³�|Z\>} ¸æ|� &e r�r � r��K� �7[��jbþp�XZ\ ¬  &o(e<|s�j[KXZ\;gY;|Zg r }5X&\ r �(p�[��j[K\(  r [��jb r e�X'§1�hb r gE[K Z\;|s�jo>e r �>|�ej�j\ r e<gÝX7§�hb r ��� ¶ ( ¨?¨ � ³'�%�'!*" ]%$j� XZehY([��h| � g-[�\��hX��hb r ��� « " ¨?¨ � ³'�%�'!0/ ] $h� V¹3Xs� r � r e�_s�hb r \ r �þ}(|��h|{| ��� Xs� r �f� r \>}�[K\( {�hb r X&Y>g r eh� r }@§¡e r ¥ª�o r \>p�dBe<|�\(  r §¡X&ewY>|Z\>}D]E�]a�Y�´�¸ µ |�\>}æ�jb r e r §¡XZe r �jXÝ[K} r \ ¥�h[c§¡d¦�jb r � r��K� �(ejX&\(XZo>\>p r }O}�Xs�7\ ¥ g � X&�([�\> 1[K\ »~¼K�/½3�mX&� r \���_|�� � Xs�!|Z\>}îb([K Zb ehX��<|s�j[KXZ\;| � §¡e r ª�o r \>p�[ r g�_7�7b([�p<b ��|&gë\(X��e r �>ejX�}�o>p r }��7[��jbæ�(e r �f[KXZo>gwp�| � p�o � |��j[KXZ\>g�V§a�|Zif[�\( O[�\��jXÝ|Zp ¥p�XZo(\��Ý�jb>|��Ý�hb r [K\�� r \>gE[��*d X'§íY;|�\>} ¸ [�gÝ|ZY;X&o���b;| � §í�jb rX&\ r X'§�Y>|�\;}�³(_�|�\ r � p�XZ\ ¬  Zo(e<|s�h[�X&\ |Zghgj[� &\(� r \��ë[Kg¤�(ehX ¥�^X&g r }�Y;|Zg r }�XZ\��hb r$r �(p�[��h|s�h[�X&\9X'§��hb r ��� ¶ ( ¨ ¶ � ³�� ��!7/ ]%$h� X&e ¥Y>[ �<| � [K\��jX��hb r ��� « " ¨ ¶ � ³�� ��!7/ ]%$j� X&\ r |�\>}m�hb r�r ��p�[ �<|s�h[�X&\mX7§�hb r �&� ¸ ¨ ¨?¨�� ³'�%�'! @�] $h� X&ejY([��h| � [K\��jX§�hb r �&� �_«�¨ ¶ � ³'� ��!7/ ]%$h�X&\ r V¦a�b r p<b>|�e<|Zp�� r ej[�g*�h[Kpë}(Xs�7\ ¥ g � XZ�([K\( §X'§��hb r �hb r X&e r �j[�p�| �»l¼��/½{�mX&� r \��hgv�7[ �hbÛ[K\>p�e r |&gE[K\( t§¡e r ª�o r \>p�d&_�|����>� , (+) � "� r «A[�gíp�|Zo>g r }DY�dÛ�jb r p�ejX�gjgj[K\( BX'§��jb r \ r o��jehXZ\îX&ejY([��h| � g�&� �_«�¨ ¶ � ³'�%�'!7/ ] $h� |Z\>} �&� "7³ ¨ ¶ � ³'� ��!7/ ]%$h� VÛ�f[K�m[ � |�e � d&_C�jb rgE�jehXZ\> 3}�Xs�7\ ¥ g � XZ�>[�\( �X'§;}(d�\;|��¤[Kp�| � �¤XZ� r \��hg��7[��jb¤} r p�e r |Zg ¥[K\( .§¡e r ª&o r \>p�d [Kg�p�|Zo>g r }þYfdD�jb r�r �¤���h[ r } }(Xs�7\ ¥ Y r \;}�[�\> �&� ¸ ¨ ¨?¨�� ³'�%�'! @�] $h� \ r o(�jehXZ\¬XZehY([��h| � ® §¡X&e3} r �<|�[ � g�X'§-�jb r p�XZ\ ¥¬  Zo(e<|s�h[�X&\>gvp�§*Væa�|ZY ��r © ° Væu�\(XZ�jb r em[K\�� r ej�(e r �<|s�h[�X&\æ[Kgm| � gjX�>ejX&�;X�g r }íY r�� Xs� �7b r \�}([Kghp�o>ghgj[�\( ¤Y>|Z\>} « p�XZ\ ¬  Zo(e<|s�h[�X&\�V

�E�� '8'��������g¦�� ������������������

a�b r�r ��� r eh[�� r \��<| � e r gEo � �<gv§¡X&e¬Y>|�\>}>g§]E�]a�Y�´ " ¥ ª µ [�\>}([ ¥p�|s�h[�\(  |ÛgE�jehXZ\( Ûp�XZehe r�� |��j[KXZ\î�7[��jbþ�hb r dfe<|ZgE��g r ª�o r \>p r X7§�hb r [�gEXZ�jXZ� r ]E�E¢Ia�Y�b;|`� r Y r�r \¬e r�� |s� r }è�jX¤\ r o(�jehXZ\¬�>|�ej�j[�p �Kr ¥b>X �Krvr �(p�[ �<|s�j[KXZ\;gE® ¨ ¸ ° V�a�b r �(e r �f[KXZo>g�p�| � p�o � |��j[KXZ\>g3[�\>}([Kp�|s� r�hb>|s��g r � r e<| � \ r o��hejX&\è�>|ZeE�h[Kp ��r ¥ b>X �Kr3r �(p�[ �<|s�j[KXZ\;g# &[�� r |w� r ejdgj[K�m[ � |�ew} r � r \>} r \>p r X'§7�hb r }�df\>|Z�¤[Kp�| � �¤X&� r \��hgm|ZgK§¡o>\>p ¥�h[�X&\¦X'§#ejXZ�h|s�h[�X&\>| � §¡e r ª�o r \>p�dZV9a�b r g r |�e rvr �(p�[ �<|s�j[KXZ\;g§¡ehXZ��hb r �&� �;� ( ¨�� ³�� ��!7/ ]%$h� XZehY([��h| � �jX r [��jb r e7X'§-�jb r �&� ¸ ( ³ " � ³'��_�&� "7³ ¨ ¶ � ³'�íXZe �&� " ¨ ¸ ©�� ³��ëX&ejY([��h| � g�VGa�b r e r §¡XZe r X&\ � d �jb r

Page 7: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

«

Cy�MTdU^�±W0���d8+= x�`+!7�0�A��138+= 4V8A:��)232y�����"�A="�74�1c= ®Üôj® CD�@� ���7!�bG�G�E:¯��8)J��¨��:��<�)="�9��H�134�>D8A��;^�Z�·TD�A="�74 ��f b�13�0����138+= �d8+=7x"`+!7�0�A��138+= �'1cJK132c�A��1L�a#

� #'�0�)46� + o é�����Ù F7��8)��8)= + o ò � � �)(Z����3������� " ®��EÙ , " ® ���� Ù ®Üô£Ù �M#9#'�0�)46�� F7��8)��8)= + o ò � � o %��^��3I�������� ®��EÙ ,%" ® ��� Ù ®Üô£Ù �M#9#'�0�)46�: F7��8)��8)= + o ò � � �)(Z����3I�� ����� ®��EÙ ,%" ® ®Üô£Ù �M#9#'�0�)46�

= �G! �$��8)= �� Ù � � :Z�I����3������� " ®��EÙ , " ® � � o �y� 3I�������� ®��jÙ ,� ®

% = �G! �$��8)= + o é�����® � � :+(`�% 3I�������� ®��EÙ , � ® ®Üô6� CD�@#'�0�A46�o = �G! �$��8)= + o é ��� ® � � :+(`�% 3��� ��� " ®��EÙ ,

� ® ®Üô6� CD�@#'�0�A46� = �G! �$��8)= + o é ��� ® � � %���^��3������� " ®��EÙ ,

� ® ®Üô6� CD�@#'�0�A46�* = �G! �$��8)= + o é ��� ® � � %���^��3I�������� ®��EÙ , � ® ®Üô6� CD�@#'�0�A46�� = �G! �$��8)= + o é ��� ® � � %s��: � 3��� ��� " ®��EÙ ,

� ® ®Üô6� CD�@#'�0�A46���( = �G! �$��8)= + o é�����® � � %s��: � 3I�� ����� ®��EÙ , � ® ®Üô6� CD�@#'�0�A46�

Rotational Frequency

Band 5 Band 6

Band 7 Band 8

Band 9 Band 10

Dyn

amic

al M

omen

ts

�yW��]^ o � ��f7F�����13JK�G=_�0�)2�)=�� b��A2cb�!�2c�A����� �7#7="�AJK1cbG�)2JK8+JK�G=_��4��� Ù�� � � Ù�! �GX#" ® ,��A4d:I! =�b���138+= 4D8):���8)�0����138+="�A2�:¯����k_!���=�b�# ��� �"! ,:I8A�?��H���=���! �$��8+=5��f7bG1L�0�A�����¤�Z� ���)=�� 4?13= ®Üôj® CD� ^

�¤XZe r¤� [Ki r�� d r ��� � |Z\>|s�h[�X&\>g�b>|`� r Y r�r \��>ejX&�;X�g r }B® p�§*V1a-|�Y ��r© ° V

��������# ����� ����%$'&)( ��� a�b r [K\&� r \>gj[��j[ r gÝX'§ëY>|�\;}(g "|�\;} « e r�� |s�h[�� r �jXî�hb r dfeh|&g*�O��n Y>|�\;}Q|Ze r·¨ ¶�´a¶ µ D |�\>}¨ ¸<´�¶ µ D1_Ce r gE� r p��j[K� r�� d&V�x#X&\>p r ej\([K\( §�hb r »l¼���½��¤XZ� r \��hgwX'§�jb r ]E�]�a�Y�´ "�_ « µ gj[� &\>|s�ho(e r �>|ZeE�h\ r e�Y>|Z\>}(g��jb r [Ke9�(e r �f[�X&o>g � dXZY;g r ej� r }í} r   r \ r e<|Zp�d¤p r |&g r g#|���� r ehdëb([� &br§¡e r ª�o r \>p�[ r g�|Zg�|gE�jehXZ\(  � dè�¤|Zeji r }�o(�(Y r \;}O| � � r ehg7�jb r gE�¤XfX��hb§Y r b>|`�f[�X&o(e�X'§»l¼K�/½V§¡XZe�XZ\ r p�X&�m�^XZ\ r \��5´¿t-[K >V « µ V�x�| � p�o � |s�h[�X&\>g�Y;|Zg r }¬XZ\|�\ r �(p�[��h|��j[KXZ\.§¡ejX&� �jb r � � �;� ( ¨�� ³'� ��!7/ ]%$h� XZehY([��h| � �hXO�hb r�&� ¸ ( ³" � ³�� ��!#" ]%$h� X&ejY([��h| � |Z\>} §¡XZe§} r §¡X&ej�ë|��j[KXZ\ �;|�e<|�� r ¥� r ehg # � 0 (+) " © _ # � 0 (�) ¨7¨ |� &e r�r p�XZ�¤�>|�e<|�Y � dB� r��K� �7[ �hb �hb rr ��� r eh[�� r \&�<| � }(|s�<|t§¡X&evY>|Z\>}(g/"¦|�\;} « ´Üt�[K >V «�µ VBc�|Z\>} "p�X&eje r gj�^XZ\>}(g#�hXí|¤\ r o��hejX&\ r �(p�[��h|��j[KXZ\~§¡ejX&� �jb r �&� �>� ( ¨ � ³��

gE�h|�� r �jX¦�hb r �jb r �&� ¸ ( ³ " � ³�� ��!7/ ]%$j� X&ejY>[ �<| � �7b([ �Kr Y;|�\>} «[K\f�ZX � � r g��hb r gj[K Z\>|��jo(e r �>|�ej�j\ r emX'§7�jb r1� |ZgE�wXZehY([��h| � VOa�b>[Kgp�XZ�¤�^XZ\ r \&��[K\&� r e<|Zp��hg�g*�hejX&\(  � dë�7[��jbè�jb r �&� « ¶7¶ �'� ³�� ��! @T]%$h�|Z\>} �&� « ¸�³�¶ � ³'�%�'! @T]%$j� XZehY([��h| � g�|s�K§¡e r ª�o r \>p�[ r g��>�+* (+) � "� r «vV�a�b�o;g�_��jb(X�g r \ r �?}>|s�h|¬b;|`� r | �K� Xs� r }¦�jX ¬ ��´¡[K\B�jb r§¡e<|�� r X'§^�jb r g r p�| � p�o � |��j[KXZ\>g µ �hb r p�XZ\ ¬  &o(e<|s�j[KXZ\;g-|&gjgjX�p�[�|s� r }�hX¤Y>|�\>}>g�]*�]a�Y�´ "�_ « µ Va�b r p�|&g r X7§�Y>|Z\>}|¸?�7[��jb!�*��X }�Xs�7\ ¥ Y r \>}�[K\(  »l¼���½

gE�jeho>p��jo(e r gw|s� � Xs� ´ �>� , (�) ¸O� r « µ |Z\>}�b([K Zb ´��>� , (�) �� r « µ §¡e r ª�o r \>p�[ r g�p�|Z\OY r e r�� |s� r }¦�jX��jb r �*��Xèo(� ¥ Y r \>}([�\( »l¼��/½ g*�hejo>p��jo(e r g�´k�hb r � Xs� r gE� Y r [K\(  r �f� r p�� r } |�\;}!�jb rb>[� &b r gE�¦p �Kr |�e � d g r�r \ µ X7§mY;|�\>} « VGa�b>[Kg§�ë|`dþe r�(;r p�¦|Z\|&p�p�[K} r \��h| � } r   r \ r e<|Zp�d [K\ r �(p�[��h|s�h[�X&\ r \ r eh Zd&_mgjo(�(�^XZej� r }Yfdë�hb r §¿|Zp����jb>|��7�jb(X�g r �*��XmY;|�\>}(g�b;|`� r gE[K�¤[ � |�e7[K\�� r \;gE[��j[ r g�Kr |&}�[K\( ¬�jXOgj[K�m[ � |�e r ��p�[ �<|s�h[�X&\ r \ r ej &dZV¬�§XZe r Xs� r eI_��ë|�if[�\> �hb r |ZghgEo>�m�(�j[KXZ\Ý�jb>|����hb(X&g r �*�#X�Y>|Z\>}(g�[K\&� r e<|Zp���|��9|¬gj�([K\X7§ « ¶ ) " �B´¡Y>|&g r }�XZ\B�jb r p�| � p�o � |��j[KXZ\>g��ë|&} r [K\æW r §*V ® ¨)«-°\µ _�hb r [Ke }�[jº r e r \��u» ¼K�/½ Y r b>|`�f[KXZo(e � r |Z\>gî�hb>|s�þ�hb r d!| � gjX[K\�� r eh|&p�3|� �|�[K\§|s�7�jb r gj�([�\}¶ ¨ ) " �^_��7b([�p<b§[�g�[K\§ ZXfX�}�|Z Ze r�r ¥� r \&���7[��jbÝ�jb r ejXZ�h|��j[KXZ\>| � §¡e r ª�o r \>p�[ r g��7b r e r �jb r o(� ¥ |�\;}}(Xs�7\ ¥ Y r \;}�[�\> &g7X�p�p�o(eIV���\¬�hb([�g3bfdf�;XZ�jb r gE[�g�_>� r gEb>XZo � }¬Y r|ZY �Kr �jXmXZY;g r ej� r p�ehX&ghg ¥ Xs� r eC &|Z�m�ë| ¥ e<|`d�gC|s���jb r [�\�� r e<|Zp�h[�X&\�^XZ[K\��hg�VA�3\�§¡XZej�jo>\>|s� r�� dZ_-�jb r �*�#X§�^X&ghgE[KY �Kr p�ehX&ghgE[K\( �g�Xfp�p�o(e|��§�jb r � r ehdþY^X��j�jXZ� |�\>} �hXZ� X'§¤Y^X��jb Y;|�\>}(g¦b([�\;} r eh[�\> �hb r p<b>|Z\>p r �jXæg r�r |�\fdB�heh|Z\>gE[��j[KXZ\;g¤X'§�Y;|�\>} « [�\DY>|Z\>} ¸gj� r p�hejo>��_�|�\;} �f[�p r � r ehgh|(V ©£\ |Z}>}�[ �h[�X&\�_��jb r [K\�� r ehY>|Z\>}�heh|Z\>gj[ �h[�X&\>g §¡X&eÛ�hb r b([K Zb §¡e r ª&o r \>p�d p�ejX�gjgj[K\(  �#X&o � } Y r� r ehdO� r |ZiO|Zg{�jb r d�|Ze rë� X�p�|s� r }�[K\��jb r ��n Y>|Z\>}(g9§ r�r }([�\( e r  &[�X&\�V3u�� � Xs� §¡e r ª�o r \>p�dè�jb r g rw� [K\ r g�|Ze r }(ejXs�7\ r }¬[�\O�jb rgj� r p�hejo>�GYfdÝ|�b([K ZbB} r \>gj[��*d¦X'§�[�\�� r \>g r \(XZeh�ë| � ¥ } r §¡XZeh� r }�heh|Z\>gj[ �h[�X&\>g�VÆ©£\5p�X&\>p � o>gj[�X&\Q�7[��jb �hb r �(e r g r \��OgE�h|��j[�g*�h[Kp�g�_�hb r e r [Kg¤\(X���|`dÝ�hX�p�XZ\ ¬ ej� r ��� r ej[K� r \��h| ��� dB�jb r bfdf�;XZ�jb ¥r gE[�g�X'§y|�}�XZo(Y ��r ��n Y;|�\>}mp�ehX&ghgE[K\( �Y r �*� r�r \mY>|�\;}(gD¸9|�\>} « V

�'���(��# �3��� ����%,'&)- ��� a�b r »~¼���½ �¤XZ� r \&�<g §¡XZeY;|�\>}(g � |�\>} ª }�X \(XZ� r �fb>[�Y([�� �¤|Zeji r }ñ}([Kghp�X&\&�h[�\fo ¥[��j[ r g r �(p r ���Q�jb r �(e r g r \>p r X'§ � r |�i X&ghp�[ ��� |s�h[�X&\>g |ZY;Xs� r�>� , (+) « " � r «vV�u��¤XZ\>  �jb r e r �¤|Z[�\>[�\(  \ r o��hejX&\ p�XZ\ ¥¬  Zo(e<|s�h[�X&\>g¬� r \��j[KXZ\(\ r } |�Y^Xs� r _�� r b>|`� r |ZghgEX�p�[�|s� r } �jb r�P® " ³ ¨�° ¶ � ³´�. 0 / ¨ � ³ µ �jX?�jb r g r Y;|�\>}(gî|&g [K\AW r §*VI® ¨ ¸ °

Page 8: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

Y(o��§|s�¬}�[jº r e r \&�§} r §¡XZeh�¤|��j[KXZ\þ�;|�e<|�� r � r e<g}´ # � 0 (+) «�¨ |�\>}# � 0 (�) ¨7¨-µ V�a�b r p�X&�m�;|�eh[KgjXZ\mX'§�p�| � p�o � |s� r }me r gEo � �hg$XZY��<|�[K\ r }§¡XZe��hb r �&� �;� ( ¨�� ³'� ��!7/ ]%$h��� �&� " ³ ¨ ¶ � ³'�%�'!*" ]%$j� r �(p�[ �<|s�j[KXZ\�7[��jb r ��� r ej[K� r \��h| � X&\ r g [KgD�(e r g r \�� r } [K\/t-[K >V « V u�(ehXZ\(X&o(\>p r }Bo(�(Y r \;}�[Kg r ��� r p� r }æ|����>� , (�) ª � r «v_-Y(o��\(XZ�DX&Y>g r ej� r }?[K\ �jb r g r }(|��h| |ZgÛ�jb rQ� |&g*� r ��� r eh[�� r \��<| ��^XZ[K\&�Op�XZehe r gE�^XZ\;}(gè�jX �>��� (+) �'© � r «wV3a�b r � r |&gEo(e r }e r�� |s�j[K� r [�\�� r \>gj[ �*dDX'§{Y>|Z\>}(g � |�\;} ª _ ¨ ( ´�¶ µ |�\;} ¨ ( ´a³ µ De r gj� r p�j[K� r�� d&_{|� &e r�r �7[��jb5| p�XZ\ ¬  Zo(e<|s�h[�X&\Q|&gjgj[K Z\(� r \��§X'§gj[� &\>|s�ho(e r �>|ZeE�h\ r e<g��7[ �hb¬\(XëgE[ � r |�Y �Kr gE[K Z\>|��jo(e r gE� � [��E�h[�\( ;V

��������# ��*� ��,���'& ��� ��� a�b r �*��X \ r � ]E�<] a�Y�´ © _ ¨ ( µY>|Z\>}(g9|�e r �jb r¤�Kr ghg��;X&�(o � |s� r }O�7[��jb�e r�� |s�j[K� r [K\&� r \>gj[��j[ r g�X'§ª ´Y³ µ |Z\>} � ´Y³ µ Dí_;e r gE� r p��j[K� r�� d&V�a�b r d¬|�e r p<b>|�e<|Zp�� r eh[ � r }èYfd|±»t¼���½��mX&� r \��~´Üt�[K >V «�µ gj[��¤[ � |Zev�hX¦�jb>X&g r X'§�Y;|�\>}(gmb>|`� ¥[K\( ��jb r � « � � � ] b([� &b ¥ z [K\��jeho>} r e,p�XZ\ ¬  Zo(e<|s�h[�X&\>g�� ] � � l�}�´�¶ µ _]E�E¢Ia�Y�´ ¨-µ _m]E�<]�a�Y�´ "(_ « _ � _ ª µ VÆa�b r ¥ e<|`dî�je<|�\>gj[ �h[�X&\ r \ r e ¥ Z[ r g3X'§#]E�<]�a�Y�´ © _ ¨ ( µ Y>|Z\>}(g�e r g r �vY �Kr �jb>X&g r X'§$|ígj[K Z\>|��jo(e r ¥�>|ZeE�h\ r eè�>|�[Ke�V a�b r p�XZehe r gj�;X&\>}�[K\( Ûgj[��¤[ � |Zej[��*d [�gèe r �¤|Zeji ¥|�Y � dþ� r��K� �ë|�[K\��h|�[K\ r } Xs� r e��jb r §¡o ��� X&Y>g r eh� r } §¡e r ª�o r \>p�de<|�\(  r V a�b r gE[K�¤[ � |�eh[��*d Y r �*� r�r \5�hb r »~¼���½¦�¤XZ� r \&�<g�[�\]E�E¢Ia�Y�´ ¨-µ |�\;} [�\ ]E�]�a�Y�´ © _ ¨ ( µ gEo> Z  r g*�ë�hb>|s�è�jb r [�\��hejo>} r e\ r o��jehXZ\þW7X&o��jb>[K|Z\ �&� �>� ( ¨ � ³'�%�'!0/ ] $h� [Kg1\(X��èXfp�p�o(�>[ r }î[�\�jb r e r�� |�� r }Qp�XZ\ ¬  Zo(e<|s�h[�X&\>g§|�\>} �hb>|s�¦�hb r p�XZehe r gE�^XZ\>}([�\( \ r o��jehXZ\B�>|ZeE�h[Kp ��r ¥ b(X ��r¤r ��p�[ �<|s�h[�X&\�[K\f�ZX � � r g9| � Xs� ¥ � df[�\( ¬X&e ¥Y([��h| � �7[��jbþ|�gj�¤| ��� »~¼���½mp�XZ\��jeh[KY(o��j[KXZ\�V a�b r XZe r �j[�p�| � �(e r ¥}�[�p�h[�X&\>gN§¿|`�ZX&o(e��jb r \ r o��hejX&\ r �(p�[��h|��j[KXZ\ �&� �>� ( ¨ � ³'�%�'!0/ ] $h�� � " ¨ ¸ ©�� ³�� ��!#" ]%$h� ²¦|Zp�p�X&eh}�[K\(  �jX �jb([�g�_í|���b([� &b ehX��<| ¥�j[KXZ\;| � §¡e r ª&o r \>p�[ r gw´��>� * (�) « � r « µ _��hb r p�ejX�gjgj[K\( ¦X'§7�hb r�&� " ¨ ¸ ©�� ³�� ��! @T]%$h� |�\>} �&� " ³ ¨ ¶ � ³'�%�'! @�] $h� [�gK§¡X ��� Xs� r }BYfd�jb;|s��X'§è�jb r �&� " ¨ ¸ ©�� ³'� ��!7/ ]%$h� |Z\>} �&� " ³ ¨ ¶ � ³'�%�'!0/ ] $h�´¿t-[K >V ¸ µ V a�|Zif[�\(  [�\��jX?|Zp�p�XZo>\&�Û�jb r gE[K�¤[ � |�eh[ �*d Y r �*� r�r \�jb r p�| � p�o � |s� r }5p�o(ej� r gÝ|�\>} �hb rDr ��� r ej[K� r \��h| � X&\ r g�_{�hb r� « � � � ]'´%� �;� ( ¨ � ³'�%�'!0/ ] $h� µ @T]'´%� " ¨ ¸ ©�� ³'�%�'! @�] $h� µ

/ ]Æ|�\>}� « � � � ]'´%� �;� ( ¨�� ³�� ��!7/ ]%$h� µ @�]_´%� " ¨ ¸ ©�� ³'� ��!7/ ]%$h� µ

/ ]{p�XZ\ ¬  &o ¥e<|s�j[KXZ\;gwb;|`� r Y r�r \ |ZghgE[K Z\ r }Û�jXBY>|�\;}(g © |�\>} ¨ ( _$e r gj� r p ¥�j[K� r�� d&V

¦9�� '8�8������ 8� ��¤������ �� � ®Üô£Ù ¡��

a�b(e r�r \ r �G��n Y>|�\;}(gí� r e r p �Kr |�e � dÛ[�} r \��j[ ¬ r } |�\>}î|Zg ¥gj[� &\ r }w�jX¤]*�h��a�Y�VCc�|�\;}(g ¨ |Z\>} ³�_Z�7[��jb: ¥ eh|`d r \ r eh Z[ r g,� r ehdp � X&g r �jXO�jb(X�g r X7§7�jb r g*�hejX&\(  � dO�^XZ�(o � |�� r } ]*�] a�Y�´ ¨+µ Y;|�\>}� r e r \>X�� r |&gE[ � dOXZY>g r eh� r }TVëa�b r ¥ eh|`d¬�heh|Z\>gj[ �h[�X&\ r \ r eh Z[ r gX'§#Y>|�\>}>g ¨ �jX�"è|�e rv� [KgE� r }O[K\Ýa-|�Y ��r «3©Vma�b r [K\�� r \>gE[��*d§X'§]E�j��a�Yvdfeh|&g*�C��nîY>|Z\>}{e r�� |s�h[�� r �jX��jb r "s\mp<b>|�\>\ r�� b>|`� r Y r�r \� r |&gEo(e r }¦�jX§Y rl¨ ) « D1V¤©£\�a-|�Y �Kr «3©_��jb r Y>|Z\>}(g�[K\�� r \;gE[��*d|�e r  Z[K� r \1[K\�� r e<p r \���X'§��hb r [K\&� r \>gj[��*d1X'§��jb r dfe<|ZgE�7Y>|�\>}�Va�b r p�X&eje r gj�^XZ\>}�[K\(  r ��� r eh[�� r \&�<| � »t¼���½Ý�¤X&� r \��hgæ|Ze r

� � X��j� r }�[K\æt-[� ;V � |Zg9|~§¡o(\;p�j[KXZ\;g9X'§�ejXZ�h|��j[KXZ\>| � §¡e r ª&o r \>p�dZV©£\ëp�X&\&�heh|&g*�-�jX{| � e r |&}�d{if\(Xs�7\í]*�h��a�Y�´\¸>_ " µ Y;|�\>}(g��7[��jbv»l¼��/½�¤XZ� r \��<g7b>|`�f[�\> ¤|¤e r  &o � |�e7Y r b>|`�f[KXZo(eI_f�jb r »~¼���½#�¤X&� r \��hgX'§O]E�j��a�Y�´ ¨ _ ³(_ ¶ µ Y;|�\>}(gÛ}�[Kgj� � |`d gj[� &\([ ¬ p�|�\���[Keje r  &o � |Zej[��j[ r g|�\;}��jb r e r §¡XZe r p�XZ�¤�>|Zej[�gjXZ\��7[��jb �jb r gj[��¤[ � |Zew�^X&ghgE[KY � d r � ¥[�g*�h[�\( �[K\Û�hb r¬� [�� r eh|��jo(e r »t¼���½e§¡XZeh�ëgwX7§�Y r b>|`�f[KXZem��|&gv\>X��r |&gEd&V

������� �3��. ���������� ©£\1�hb([Kg�|Z\>| � d�gE[�g#�jb r � « � � � ��b([K Zb ¥ z

[K\��jeho>} r e�p�XZ\ ¬  Zo(e<|s�h[�X&\§b>|Zg�Y r�r \B|Zghgj[� &\ r }¬�hXO]*�h��a�Y�´ ¨+µ |Zg�hb r �¤X&gE�ë�(ejX&Y>|�Y ��r XZ\ r |Z\>}D� r �(ehXZ�^X&g r [ �1|&gm�jb r dfe<|ZgE��(n Y>|Z\>}ë[K\�]E�j��a�Y�VCa�X{e r [K\�§¡X&ehp r �jb([�g�g*�<|s� r � r \���_&�jb r Y>|�\;}]E�h��a�Y�´ ¨+µ b>|&g9|Zp��jo>| ��� d§�jb r b([K Zb r g*�{[K\�� r \;gE[��*dOX7§�| ��� Y>|Z\>}(g§¡X&o(\>}ë[K\í�hb([�g#\fo>p ��r o>g�V�a�b r p�X&�¤�>|�eh[KgjXZ\ëY r �*� r�r \ë�jb r XZe r �h[ ¥p�| � e r gjo � �<g�|�\>} r ��� r eh[�� r \��<| � XZ\ r gM§¡XZe3]E�j��a�Y�´ ¨ _ ³(_ ¶ µ Y>|Z\>}(g[�g�[ ��� o>gE�je<|s� r }�[�\¬t-[� ;V ª V

65

70

75

80

85

90

95

100

105

110

115

0.4 0.5 0.6 0.7 0.8

152Tb(2)152Dy(2)150Tb(3)151Tb(1)

Rotational Frequency

Dyn

amic

al M

omen

ts�yW��]^ �,��f F��/��1cJK��='�0�A2<�'#7="�)JK13b��A2 JK8)JK�G=_��4 � � Ù�� � � Ù ! �GX " ® ,�)4?�z:¯!�= b���138+=@8A:<��8A�0�A��138+=��)2:¯����k_!���=�b�# � ! �GX � :¯8)����H��7�Z�.�"�)=�� 4®Üô£Ù CD� � +,/& ®Üô£Ù �M# � +,/& ®Üô6� CD� � �+,D�)="� ®Üôj® CD� � ��,/^

�'���(�)����. +�,� $ �.� a�b r ¥ eh|`d r \ r eh Z[ r gíX'§w]*�h��a�Y�´a³ µY;|�\>}�|�e r � r ehdíp � X&g r �hXm�jb r�r \ r eh Z[ r g�X'§��jb r ]E�j� n3d�´Y³ µ Y>|�\;}Xs� r eë| � |Zej  r �;|�ej�¤X7§��hb r XZY;g r ej� r } r \ r eh Zd�e<|�\>  r V a�b r [�e» ¼��/½ �mX&� r \��hg�gEb>Xs� �jb r gj|Z� r g*� r�r � � d¬o(�>ej[�gE[K\( �g � XZ� r Y r ¥� Xs��>� $ (�) ";"�� r « ´¿t-[� ;V �'µ Víu�Y^Xs� r �hb([KgK§¡e r ª&o r \>p�dZ_�| ����hb r Y;|�\>}(g$[�\èª&o r gE�j[KXZ\}´ ]E�h� a�Y�´Y³ µ _ ]E�j� n�dy´Y³ µ |�\>} ]E�E¢ a�Y�´a¶ µ0µ�ë|Z\([c§ r g*���hb r g � XZ� r gE[K�¤[ � |�e��hXm�jb>|���X'§C]E�]�a�Y�´ ¨+µ V,a�b r »l¼���½�¤X&� r \��3X'§$]*�j¢`a�Y�´�¶ µ �(e r g r \��hg�gj[K�m[ � |�e�§ r |s�jo>e r g�_ r gj� r p�[�| �K� d|m�(ehXZ\>XZo(\>p r }è[�\;p�e r |Zg r [�\}»~¼���½#Y r�� Xs� �>� $ (�) " ( � r «wV©£\BW r §*VS® ³ ( ° �jb r � « � � � ]'´%� ¶ ( ¨?¨�� ³'� µ @T] � � �ëp�X&\ ¬  Zo>eh|��j[KXZ\

b;|Zg{Y r�r \æ|ZghgE[K Z\ r }Ý�jX�]*�h��n�d�´a³ µ |Zg��hb r �¤X�g*� � [Ki r�� d�[�\�� r e ¥�>e r �h|s�h[�X&\�Vþa�b r [K\>p�e r |&g r [K\·»l¼��/½wY r�� Xs� �>�10 (�) "�� r «� r « b>|ZgèY r�r \Q|s�E�hej[KY(o�� r }î�hXÛ�hb r p�ehX&ghgE[K\( �Y r �*� r�r \ �jb r��� �;� ( ¨�� ³'�í|Z\>} � � ¶ ¶ ( ¨ � ³'�íXZehY([��h| � g�V t>XZe¬�jb r ]*�j¢�a�Y�´�¶ µY;|�\>} �hb r � « ��� � � b([K Zb ¥ z [K\��jeho>} r e?p�X&\ ¬  Zo>eh|��j[KXZ\ b>|ZgY r�r \O�(ehXZ�^X&g r }�_^p�XZo(� �Kr }§�jXè|1b(X �Kr [K\ r [ �hb r e��jb r � « "'¸!" � ³'�X&e � « " ¨?¨�� ³'��\ r o��jehXZ\5X&ejY>[ �<| � gB® ¨ �)° V a�b r gjb>|Zej� eh[Kg r X7§»l¼��/½ |s� �>� $ (�) ¸ " � r « ��|ZgD|ZghgEX�p�[�|s� r } �hX | z-0 �ª�o>|&gE[K\ r o��jehXZ\ �;|�[Ke r } Y>|�\;} p�ehX&ghgE[K\( ;V ��o(e r ��� r eh[�� r \&�e r gjo � �hgD§¡X&e,Y>|Z\>}r³9|� &e r�r eh|��jb r eC� r���� �7[ �hbíp�| � p�o � |��j[KXZ\@§¡XZe�|p�XZ\ ¬  Zo(e<|s�h[�X&\vY>|&g r }vX&\v�*��X r �(p�[��h|s�h[�X&\>g�_�XZ\ r \ r o��jehXZ\@§¡ehXZ��hb r �&� ¸ ( ³ " � ³'�%�'!7/ ] $h� XZehY([��h| � [K\&�hX¦�hb r �&� "7³ ¨ ¶ � ³'� ��!7/ ]%$h�gE�h|�� r |�\;} |D�(ehX��jX&\ §¡ehXZ� �hb r ��� ¶ ( ¨?¨ � ³'�%�'! @T]%$j� XZehY([��h| �[K\��jXv�jb r � � "'¶ ( ¨�� ³'�%�'! @�] $h� VCa�b r \ r o��hejX&\ r �(p�[ �<|s�j[KXZ\ëb;|Zg�|e r�� |s�h[�� r�� d � Xs� ¥ p�X�g*��[�\ r \ r eh Zd¦}�o r �hX§|èb>[� &b ¥ } r \>gj[ �*d ��r � r��X7§{XZehY([��h| � g�V a�b r }�[�gjp�XZ\��j[K\fo([ �*dî[K\ »l¼K�/½ëX&Y>g r eh� r } |ZY;Xs� r�>� $1(�) � � r « e r gEo � �9§¡ehXZ�Æ�jb r p�ehX&ghgj[�\( ¬X7§��hb r � � ]¤|�\;}��� "'¶ ( ¨�� ³'� ��! @�] $h� X&ejY>[ �<| � g�V

�'���(� �3��. ���� - ��� u3p�p�X&eh}�[K\( Û�jXîXZo(e§p�| � p�o � |s�h[�X&\>g�_

Page 9: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

ª

Cy�VTDU^�sW$W/���d8+=7x"`+!7�0�A��138+= 4?8):��Z� �"�)=�� 4�13= ®Üô£Ù CD� �7��� ! bG���9:¯��8+J��¨� :��y�A="�9��H�134�>D8)��;�^�Z�·TD�A="�74 �Pf7bG1L�0����1c8)= �d8+=7x"`+!7�0�A��138+= �'13JK1c2c����13�a#

� #'�0�)46� + o é�� ���é F ��8A��8+= + o é � � �+(�����3I������ " ®��jÙ , " ® � � %��+(C��3������� " ®��EÙ ,

� ® ®Üô£Ù �M# � +,=���! �$��8+= �� Ù � � :+(`d% 3I�������� ®��jÙ ,%" ® � � %Is�y� 3I�������� ®��jÙ , � ®

� =���! �$��8+= + o é ���� Ù � � :-(I�% 3I�� ��� " ®��jÙ ,%" ® � � o �^��3��� ��� " ®��EÙ ,� ® ®Üô6� CD�5#7�0�A46�

: =���! �$��8+= + o é ���� Ù � � :+(`d% 3I�������� ®��jÙ , � ® ®Üôj® CD�5#7�0�A46�% =���! �$��8+= + o é����IÙ � � :+(`�% 3I������ " ®��jÙ ,

� ® ®Üôj® CD�5#7�0�A46�

Y>|Z\>}Q]E�j�Ia�Y�´a¶ µ [Kg¬gjo( Z  r gE� r } �jXDY r Y>|&g r } XZ\Q|Û\ r o��jehXZ\r �(p�[ �<|s�j[KXZ\{§¡ejX&� �jb r � � ¸ ( ³" � ³�� ��! @T]%$h� XZehY([��h| � [K\&�hX �hb r�&� �_«¨ ¶ � ³�� ��! @T]%$h� XZ\ r V a�b r }�[Kghp�X&\��j[K\�o>[ �*dQXZY>g r eh� r } |s��>� $ (�) « � r «î[K\v�hb r »l¼���½T�¤XZ� r \��C[�gCp�|�o;g r }{Yfd��jb r [K\�� r e ¥|Zp��j[KXZ\ Y r �*� r�r \þ\(XZ\ [�\��jeho>} r e1X&ejY([��h| � g �&� ¸ ( ³ " � ³�� ��! @T]%$h�|�\;} � � « ¸"³�¶ � ³'�%�'! @�] $h� V

��������# �3��. ����54 & $&���a�b r g r �*��X1gE[K Z\;|s�jo>e r �>|ZeE�h\ r e�Y>|�\;}(g�b>|`� r | � e r |Z}�dèY r�r \

XZY;g r ej� r }æ[K\D�jb([�gí\fo>p ��r o>g¤�7[��jb »~¼���½w�mX&� r \��hgë� r ehdÛgj[�� ¥[ � |Ze �hXG�jb;|s� X'§ ]E�<]�a�Y�´ ¨-µ ® ¨7¨�° V � [��jb �jb r XZY>g r eh�s| ¥�j[KXZ\AX7§�\ r � ¥ e<|`d �je<|�\>gj[ �h[�X&\>g [K\!�jb r § r�r }([�\(  e r  Z[KXZ\�_�jb>[Kg gj[��¤[ � |Zej[��*d![KgQ�ë|�[K\��h|Z[�\ r }Go(�Æ�jX/�jb r b>[� &b r gE�QX&Y ¥g r eh� r }OejXZ�h|��j[KXZ\>| � §¡e r ª�o r \>p�d&Vma�b r g r¤r �f� r eh[K� r \��h| � e r gjo � �hg|� &e r�r e<|s�jb r e3� r��K� �7[ �hbÝp�| � p�o � |s�h[�X&\>g�§¡X&e3�hb r p�XZ\ ¬  Zo(e<|s�h[�X&\� « � � � � ´%� ¸ ( ³ " � ³'� ��!#" ] $h� µ

/ ] ´¿t-[K >V ª µ V�a-|�Y �Kr ©E©Tgjo(�¤�ë|�eh[ � r g�jb r p�XZ\ ¬  Zo(e<|s�h[�X&\O|Zghgj[� &\(� r \��hg]§¡XZe9�s|Zej[KXZo>g���n Y;|�\>}(g�X&Y ¥g r eh� r }1[�\ ]E�j� a�Y�[KgjX��hXZ� r g�V

Rotational Frequency

Band 1 Band 2

Band 3 Band 4

Band 5

Dyn

amic

al M

omen

ts

�yW��]^M*7� ��f7F�����13JK�G=_�0�)2�)=�� b��A2cb�!�2c�A����� �7#7="�AJK1cbG�)2JK8+JK�G=_��4� � Ù�� � � Ù ! ��X " ® ,6�A4S:¯!�= b���138+=�4S8):���8A�0�A��138+=��)2y:j����k_!��G= b�# ��� �"! ,:I8A�?��H��3�Z� �"�)=�� 4�13= ®Üô£Ù CD��^

�@��� ¦e£e r¦��d¥�����£e :�

u�\ r �f� r \>gj[�� r gE�jo>}�d X7§���n Y>|Z\>}(g [�\ ]E�<]� ]*�h� a�Y/[KgjX ¥�hXZ� r g�b>|&g#Y r�r \1� r e/§¡XZeh� r }T_(| ��� Xs�7[�\> 9�jb r e r ¥ [�\�� r eh�(e r �h|��j[KXZ\X7§v\fo>p �Kr X&\([�pOp�X&\ ¬  &o(eh|��j[KXZ\þ|&gjgj[� &\(� r \��hgèXZ\ �jb r Y>|&gE[�g1X7§p�XZ�¤�>|Zej[�gEX&\ëY r �*� r�r \ r ��� r eh[�� r \��<| � e r gEo � �<g�|Z\>} �3\([K� r e<gh| � ¥�C|Zeh|Z� r �jeh[�gj|��j[KXZ\<��XfX�}(g ¥ ��|��fX&\ � r |�\ ¥ ¬ r�� } p�| � p�o � |s�h[�X&\>g�Vt-[K� r \ r � ��n Y>|Z\>}(g�b>|`� r Y r�r \Q}�[�ghp�Xs� r e r }T_�e<|�[�gE[K\(  �jb r\fo(�wY r e¤X'§�if\(Xs�7\ Y>|�\;}(gw�jX�� r \D|Z\>} ¬ � r _#[�\þ]*�]�a�Y |�\;}]E�h��a�Yî[KgjX��hXZ� r g�_#e r gj� r p�h[�� r�� dZV u3�¤XZ\( B�hb(X&g r _#�*�#XBY>|Z\>}(g®¨]E�<]�a�Y�´\¸ µ |Z\>}�]*�h��a�Y�´Y³ µ$° b>|`� r Y r�r \�[�\�� r eh�(e r � r }Ý|&g�|1�*��X�;|�ej�j[�p �Kr ¥ b(X �Kr$r ��p�[ �<|s�h[�X&\>gN´¡XZ\ r \ r o��hejX&\v� � o>g�XZ\ r �(ehX��hXZ\ µ [K\X&eh} r e��jX¤e r �(ehX�}�o>p r �hb r [Ke3}�df\>|Z�m[�p�| � �¤XZ� r \��hg�X7§�[K\ r ej�j[�|(V

©£\��jb r �>e r g r \&� r �f� r eh[K� r \����hb r9r ��� r eh[�� r \&�<| � }(|��h|m� r e rX&Y��h|Z[�\ r }m}�o(eh[�\( ��hb r9¨ � }(|`d{eho(\¤�7[��jbm�jb r �!�3W���c�u3���è©£«|Zeje<|`dZV-a�b r XZY(�h|�[K\ r }1b([K Zb§ª�o>| � [��*d1gj� r p�je<|¤| �K� Xs� r }í�jX ¬ \;}�hb r �heh|Z\>gE[��j[KXZ\;g7�7b(X&g r �(e r g r \;p r �ë|Z} r [ ���;X�gjgj[�Y ��r �hX r�� [�� ¥[K\>|�� r |1\�o>�vY r e3X7§,p�XZ�¤� r �h[�\( �gE[K\(  ��r ¥ \fo>p ��r XZ\([�p9p�X&\ ¬  Zo>eh| ¥�h[�X&\>g{|Z\>}B|s�9�jb r gj|Z� r �h[�� r �>ejX&�;X�g r \ r |�e � d¦o>\>|��wY([� &XZo>g[K\�� r ej�(e r �<|s�h[�X&\ [K\D� r eh�ëg¤X'§��jb r XZ�jb r ehg�V ��o(e r ��� r eh[�� r \&�gjb(Xs��g�p �Kr |Ze � d¬�jb;|s���jb r b>[� &b ¥ �>e r p�[�gE[KXZ\ r ��� r ej[K� r \��h| � }(|s�<||Ze r p�eho>p�[�| � §¡XZe�} r � r eh�¤[�\([K\( w�jb r o(\>} r e � df[K\( wgj[�\>  �Kr ¥ �>|�ej�j[�p �KrgE�jeho>p��jo(e r |�\;}íp�ehX&ghg ¥ � r g*�h[�\> ��jb r �m[�p�ehX&ghp�X&�([�p7\fo>p �Kr |Ze$b([K Zb ¥gj�([K\þ�hb r X&ej[ r gè[�\ |�\ r �íp�[ r \��§��|`d&V a�b([Kg�[�g�Y r p�|�o;g r �jb r\fo(� r ejX&o>g{p�ehX&ghgj[�\( �g{|��¤X&\( ¬�jb r gE[K\(  ��r ¥ �>|ZeE�h[Kp ��r ehXZo(�jb([�|�\>g�hb>|s�v|Z�(� r |�e{|����jb r � r ehd¦b([K Zb[§¡e r ª�o r \>p�d � [��¤[��v�7b r e r �jb rgjo(� r e<} r §¡X&ej� r }Û�ë|� &[Kp¬ �|��>g ¬ \>| �K� dDp � X&g r ¥ X'º r e1|·´Üp�X&� ¥� � [�p�|�� r }ÛY(o��ëX'§k� r \ o(\([�ª&o r |Z\>}æ�^Xs� r e0§¡o �Iµ gjp<b r � r X7§3o(� ¥|Z\>}§X&e�}�Xs�7\ ¥ Y r \>}([�\( èg*�hejo>p��jo(e r g3�jb;|s�9}�[KgE�j[K\( &o([KgjbOp ��r |�e � d|Z�¤XZ\( §�hb r \fo(� r ejX&o>gvY;|�\>}(gv�7b(X&g r }(d�\;|��¤[Kp�| � �mX&� r \��hgXZ�jb r ej�7[�g r Y r b>|`� r [�\§|m� r ejdíe r  &o � |�e��¤|Z\(\ r e�V

a�b r e r gEo � �<g#X&Y��h|Z[�\ r }ëb r e r [K\>}�[�p�|s� r �hb>|s���jb r �¤X�g*���;Xs� ¥r e0§¡o � �(e r g r \���}(|`d1} r � r p��j[KXZ\¦|Zeje<|`d�g#|Ze r |s�7�hb r9� [��¤[��3X'§-�jb r} r � r p�h[�X&\mp�|��>|&p�[��j[ r g�\ r�r } r }v�jX�� r e/§¡XZeh� �jb r p�X&\>p � o>gj[�� r \fo ¥p ��r |�e�b([K Zb ¥ gj�([�\mg*�hejo;p�jo>e r } r � r eh�¤[�\>|��j[KXZ\�V-©��CY r p�X&� r g�p �Kr |�e�hb>|s�#�7[ �hbí|�\¤[�\;p�e r |Zg r X'§y�jb r } r � r p��j[KXZ\ r �íp�[ r \>p�dwY�dm|�Y^XZo��|E§¿|Zp��jX&e�X7§�¸t´¿p�§*V,u�l�uCa�u |�\;}�l�W��#a�u µ _(|E§ r �Q}(|`d�g#eho(\ ¥\>[�\( Ý�j[K� r§r ��� r eh[�� r \��<gwX7§3�hb r �*d�� r � r e0§¡X&ej� r }Ûb r e r �7[ ���Y r p�XZ� r X'§ r ���he r � r [K�m�^XZej�h|Z\>p r [�\ �jb r §¡o��ho(e r �7[��jb �jb rY r |Z� ¥ �h[�� r9� [��¤[��h|s�h[�X&\>g�Y r p�X&�¤[�\( ¤�(ehXZb>[�Y([��j[K� r�� dègjp�|�e<p r V

Page 10: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

©

�¨�%���y^ � ^�Cd>?13= ¶j²C½Ißc� &&�PH_# 4G^ QS�Gq�^�U����$��^����&�*Z�I� � � � * o ,� �VQ^ X]^ �d^��-�)= 4$4$�G=�4M�)="�@CM^�U�^���H�8_87&��V= = ^7QS�Gq�^�pV!�bG2�^������$��^�'bG1�^���v�`�� � � ��� ��,�7^ �d^��'H"�A��F��/#Z Ò�'b/H��A:I�/��&7����8+` ^����A�$��^SpV!�bG2�^$�PH'#74G^���þ��* � � ��� +,�7^��N!�� �G;�&&����8+` ^f���A�$��^ pM! bG2�^f�PH_# 4G^���è�<�Z� � � ��� ),�V^DTD�);_�0�A4$H &VTV^� M�+�A4@�A="� )�^dpN�����A����>?13b��)&��S=�='! ^�QS�Gq�^pV!�bG2�^&���A�$��^��7bG1�^���� :-*+% � � ��� %+,

� � ���7^�QS8+� 1c= ¶j²C½Ißc� &"C<8h���NF�! ��23134$H����� :"����^����>?1c8);�&�� ^��N!"�7�G;�&&)�^]pN���G�A����>?13b��+&�� ^��7;)�)234$;'1@�A="�

CM^')l�/��=�����&��d8+JKF�^��PH_#74G^ �d8)JKJi^����¤� � � � � * ,� % � �V^ ! ^f�y���$�0�)b0H�� ¶j²�½Ißc� &7pM! bG2�^f�PH_# 4 � �����&�A*-% � � ��� :-,� o �MTS^���H��A�$�0���$� ¶j²C½�ßc� &&��H_#74G^"U����$��^ � � ��"&( o * � � ��� %),� � �]^�� �N� �0�)= bG� ¶j²C½Ißc� &��PH_#74G^"U����$��^ �!��� ��&( � ( � � ��� :-,� * �MCM^�T�#'��4$;'1 ¶j²�½Ißc� &&�PH'#74G^ QV��q^ U����$��^��"�<&;� o %A( � � ��� (-,� � �NR]^`�'���#�G8�>?4$;71�& �dH�^_�y13=�b0;h�A="���]^s��� ��Gq-8+46��&-pM!�b�2\^)WY= 46�$��^_�A="�! �/��H ^ � ��"�<&�%)%I � � ����� ,�¨��( ����^��y2313��8)�$���+&)O]^ � ^� %$!7�$��JK�G13����&���^�Td��� =��A��b��/# ;�&��]^��7�d�7�0�)=�b��+&

TS^� M�+�A4G&s�y^AQV8)J9�)13= &��dH ^)CDH���1c4$��= &&�7^ �y^)XM13q'13�G=h�A="�'� ^ m �G=�&pV!�bG2�^7WY= 46�$��^"�A="� ! ����H ^ �(� �) &��`+% � � ��� +,

�¨�I�%�MTS^*��H"���$�0�+�6�7&��PH ^ ¿�h^�CDH �G4$134G&NOV=�13q-����4$1L� ��wU 8+! 134¤���)46����! ��&�_�$�0�)4$��8)! ��`eW0&��7�0�)=�b�� � � ��� :_,

�¨�� ���7^�QS8+� 1c=�&�pV!�bG2�^7WY= 46�$��^"�A="� ! ����H ^ � �����ë)*I � )()(-%+,�¨�� �MCM^ Q^�)l�/��=����M�)=���� ^��N!�� �G;�&��D��^����A�0�9�)=��ipM! bG23���A�����A�0�

C<�)��23�G4G&���)�� � � � ��� ),%4CM^7Q^ )l����= ���?�)=��(� ^Z�N!�� �G;�&Z�D��^������0�e�)=��EpV!�bG23�����,���A�0�C<�)��23�G4G&����è� � � ��� %),

�¨��:"�Vpz^&��2;�V8)!"�+� ¶j²C½Ißc� &7pV!�bG2�^���H_#74G^ � �����è��%+% � A(+()(-,�¨��% � �dH�^ �y1c= b/; ¶j²,½�ßc� &&��!7��^f�PH_# 4G^�� ^ � è���� � � ��� *-,�¨� o �VW0^7QM�A`+="����4$4$8+= ¶j²�½Ißc� &7pM! bG2�^f�PH_# 4G^ � �����1� o b � � ��� �+,

�à� �$�y^��"�)23238+= ¶j²�½Ißc� &&��H_#74G^ QV�Gq�^ ¦ ��& � � � � ��� %+,�à�G*"�?pz^+��1c=_�,� ¶j²;½Ißc� & ËCº�¾¸E¶E¶£µ�³K°�á�±,¾�Þ-²K¹&¶�ï$ï$ï ��¯£¯£¯T¯E°�²Ü¶jºE°�½�²k³k¾�°�½Iß

øv³�°�²Ü¶jº Ä ¶E¶j²k³K°�ám¾�°mÉ�´&¸<ßc�(Ë-¹�â�±�� & � a*` � )(+()(-,/&T�8)��JK138�à� � �#��^"�y2313��8)�$��� ¶j²C½�ßc� &&��H_#74G^�QS�Gq9U����$��^����"&�:` ��� � � ��� �-,� A("�$�y^ � ^f�N�)`+=��)232 ¶j²�½Ißc� &&�PH'#74G^�U ���$��^ �!��� ��&��Z�<� � � ��� :_,� s� �?W0^- M�)J9�)JK8A��8@�A="�wTV^<Q^ ! 8)�$���G234$8)= &��PH_# 4G^^�'b���13F �0�7^ ¡ ���� � ��� %),?Q�� 4

�PH_# 4G^�U �/�$��^ �.����� � � ��� :-,# � : ^� � �/� ^��N!"�7�G;�&$�z^�� �8 ���� ��v�A="�B�h^dQV8)410 23#_&$�Sb��0�§�PH'#74G^��y8+238+=�^

� � �& o +% � A(+(`), � :¯���G�G2L# ��q+�A1c2c�A��23� �A� H_�$��F � �I����H& >�>�>�^ 1L:Y^ !��/^ ��� !�^ F 2��)�)b/�0�`�+,

� ��"� )�^��h^)U ! 8 &`�z^)Td8+! `+! ���$��8+! b/H��7&&�7^I�N8)�"�Ab��G��>?4$;'1�&&� ^��N!�� �G;�A="�(2z^�U�1�&��PH'#74G^7QS�Gq�^ ¦ �� � � ��� %+,$ � * � 4� ^��N!�� �G;�&3� ^��N8)�"�)b#�G��>?4$;'1�& )�^�U ! 8 &��z^�Td8)!�`+! ���$��8+! b/H���A="�42z^<U�1�&��P��8_b)^yWY=_��^ )l8A��;'4$H�8+Fw8+=§�PH_#74$1cb�4>?1L��HlQS�GbG8)132�'�GF"���0�A��8)��4V�)=��w�N�/���Gb���8)�#�?�$�0��#74G& pM��>Û�N��2cH 1�&�Wa="� 1c�{� ��� %'^

� �:��,�h^7�^� N�A4$2c13F�&9��^��y2313��8)�$���+& �V^7��^��'q-�G=�4$4$8)= &]�)=��5� ^ �V^)l�+���713=�`)��8)= &���H_#74G^7QV��q^ ¦ ���&�Q���* � � � � ��� *+,

� )% �*6]^T�'!�= &7� ^ m H"�A=�` �A="� ! ^ �M!�1c�7�$#_&y��H_#74G^ QV�Gq�^ U �/�$��^8���&��� � * � � ��� :-,

�@�����4� 6767�V i¤@� 5

©£\è�jb([�g�u��(� r \>}([ ��� r b>|`� r gjo(�¤�¤|Zej[ � r }ë�hb r�r ��� r ej[K� r \ ¥�<| � e r gjo � �hgCX&Y��h|Z[�\ r }wgjXh§¿|�e,X&\v�hb r gjo(� r eh} r §¡XZeh� r }wY>|�\;}(gC[K\]E�]<� ]E�j��a�YO\fo>p ��r [ÜV9a�b r g r e r gEo � �<g�_y[K\¦�jb r §¡X&ej�!X'§$�jb r �je<|�\ ¥gj[��j[KXZ\ r \ r ej &[ r g7|�e r  &[�� r \�[�\§a-|�Y �Kr g�©j©E© ¥ «3©V

Page 11: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

¨ (

Cy�VTDU^�.W$W$W/�<C �0�)= 4$13��138)=l�G=��/��`+13�G4 � ;-�GX�,N�A="�v46�0�A��1346��13b��)2D! =�bG�/�£ �0�)13=_��13�G4�:I8A�z��H �{�Z�u�"�)=�� 4�13= ®Üôj® CD��^9CDH��K46#7Jh��8)2��K13=�� 13b��A����4=��/>B�$�0�A=�4$1L��138+=�4S8)�V8+2c�i8)=��G4?>?1L��Hr�)=i�G= H"�A=�bG���5F ���GbG134$138+=�^?CDH���"�A="�l13=_���G=�4$1L��13�G4h�A���E`+13q-�G=}13=tF�����bG�G=_�h8):?��H��913=_���G=�4$1L�Y#~8):S��H��#'�0�)46���"�A="��^�CDH��?���$��8)���"����4�13= bG23!"� ����H �S46�0����1346��1cbG�)2���!�b���!��A��138+= 4�)=��v��H �e� 134$F�����4$138)=l8):D��H �h���)="�v13='����=�4$1L�Y#v�A2c8)=�`@��H �{�Z� �"�A="�F�2c�������)!�^

TD�)=��1� TD�)=��¤ TD�A="�¤� TD�A="��:��()( � +,�� � � �-,�� �: � �+,�� �� � ),��

%)% o 9 � +, �o (�� 9à� � �+,o : o 9 � ),o � � 9 : � ��, o *Z� 9 � �-, � 9 ( � ��, o 9 � � �-, o � � 9 � �-, �

o *'9 o � ��, *I 9 � � ��, � �'9 % � �-, %+% 9 � � �-,��*Z�G('9 * � ��, *`A*'9 : � ), *I)('9 % � �-, *���% 9 o7� :_,*-%��'9 � � ��, * :�9 o � ��, * o 9 * � �-, * o % 9 � � �-,* � 9 � ��, � s� 9 : � ��, � ��% 9 o7� �-, � �� 9 : � �-,� :` 9 o � ��, � o *'9 � ), � o �'9 � � �-, � o ( 9 � �-,� *)*'9 � ��, ��(���% 9 : � ��, ��(��� 9 * � �-, �G(+(+* 9 % � �-,��(I� :�9 � ��, ��( o �'9 ( � ��, ��( o � 9 * � �-, �G(-% o 9 ( � �-,��(+*�� 9 * � ��, �I����('9 � +, �I���I� 9 � � �-, ����( :'9 ( � �-,�I�� � 9 * � ��, �I��%)*'9 � +, �I� o ( 9 � � �-, ����%�� 9 � � �-,�I� *'9 % � ��, ��A( o 9 � � +, ��A( � 9 * � �-, �)(+( 9 � � �-,��I 9 � � ��, ��)%+% 9 ( � +, ��)% � 9 : � �-, � :-* 9 % � �-,�� *'9 ( � ��, ��)(I�'9 � � +, ��)( � 9 ( � �-, � � o 9 � � �-,��`A*'9 : � ��, ��+%�� 9 : � ��, ��+%)* 9 � �-, �<� :_% 9 : � �-,�� � 9 % � ��, �� ��� 9 * � +, ��:+(+* 9 � �-, �<� � :'9 � � �-,��:`��� 9à� � ��, ��: :-*'9 � +, ��:-% 9 � �-, � : :`� 9 � � �-,��:-*��'9 � � ��, ��: � o 9 � � +, ��%A( o 9 o7� �-, � : � :�9 o � :-,����%��+% 9 % � ), ��%�: :'9 � � �-, � ��%+%+% 9 * � :_, � � ��%+% � � +,$, ���%A* � 9à� � :_, � ��% � :�9 � � 9 (-, � � o ( :'9 � � � 9 (+, �

� o :` 9 o � � 9 (-,��

Page 12: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

¨ ¨

Cy�MTDU;�±WaX]���713JK132c�A�?��8h��H"���?13= Cy�)� 23��W$W$Wd��!7��:I8A�MTd�)="�74V%� a*7^TD�)=�� % TD�)=�� o TD�A="� TD�A="�5*�� � �-,�� � : � �-,�� �G( � �+,�� ��( � ),�� ( � 9 * � �+, � ('9 o � �+, % :�9 � � :_, o ('9 o � �+, *I�)*'9 % � �+, *)( o 9 % � :_, *I�Z� 9 * � �-, �*Z�G('9 � � �+, *+* � 9à� � �+, *+% 9 ( � :_, *)*` 9 : � �-,* o 9 � � �+, � :+('9 % � �+, � (+*'9 � :_, � �I� 9 � �-,� �<�'9 � �+, ��� � 9 � � �+, � % � 9 o7� :_, � *-% 9 : � �-,� o % 9 o � �+, ��( : :�9 % � �-, ��(��I� 9 � � :_, �G(I� 9 � �-,�G(Z�G*'9 % � �+, ��( � 9à� � �-, ��( o � 9 % � :_, �G(+* � 9 � �-,�G( � 9 ( � �+, �I��%)('9à� � �-, �I��� o 9 ( � :_, ����:s 9 ( � �-,������'9 : � �+, ��A(I�'9 ( � �-, �I� o * 9 * � :_, ��� � % 9 ( � �-,��� o 9 � �+, ��)% o 9 : � �-, ���I 9 � :_, � :-* 9 : � �-,�I � 9 * � �+, ��)( � 9 � � �-, �� % 9 � :_, �<�+(Z� 9 % � :_,�)*I 9 : � �+, �� o �'9 % � �-, ��I)* 9 � � :_, �<�-%+% 9à� � �-,�<�I� 9à� � �+, ��:&� 9 � � � 9 (-, ��)*Z� 9 � � :_, � :-(+* 9 � � :_,�<� � � 9 � �+, ��: o � 9 o7� :_, � :`�-% 9 � :_, � � : o � 9 % � :_,� : :-% 9 % � :-, ��%s� � 9 o7� � 9 (-,�� � :-* � 9 � :_,�� ��%�� 9 o � :-,��� : ��� 9 o � :-, ��%)%)*'9 * � � 9à��, � � ��%�:_% 9 � � � 9 (-,$, ���%+%��'9 o � %), �

Cy�MTdU^�±Xz���'13JK1c2c������8h��H"���?1c=iCy�)� 2c��W$W$W0&�� ! �D:¯8)�MTD�)=�� 4 � *�G(7^TD�)=�� � TD�A="�è�G(* � +,�� � ),��

*`�:�9 : � %),* �'9 � � �+,� �:�9 � :-,� % 9 � �+,��(` o 9 o � �+, �G(+(Z� 9 o � :_,��( � 9 * � :-, �G(-%�� 9 � :_,�I��)('9 � � �+, ����(` 9 � � :_,�I��*�� 9 : � :-, ����%+% 9 � %+,������'9 � :-, �)( 9 : � :_,��)*+% 9 o � :-, �+% � 9 * � :_,��I�)*'9 : � :-, �<�Z�� 9 ( � :_,�� � � 9 � � :-, �<� o � 9 : � %+,��: : :�9 � %), � :&� o 9 % � :_,��: � 9 � �\o , � : o � 9à� � %+,��%�:-* � ),

Page 13: Extended investigation of superdeformed bands in …Extended investigation of superdeformed bands in 151;152Tb nuclei J. Robin, Th. Byrski, G. Duch^ene, F.A. Beck, D. Curien, N. Dubray,

¨ ³

Cy�VTDU^�.XMW/�<C �0�A=�4$1L��138+=t�G= ����`+13�G4 � ;-�GXN,N�)="�w46�0�A��1346��13b��)2D! =�bG�/�£ �0�)13=_��13�G4�:I8A�z��H �{�Z�u�"�)=�� 4�13= ®Üô£Ù CD��^9CDH��K46#7Jh��8)2��K13=�� 13b��A����4=��/>B�$�0�A=�4$1L��138+=�4S8)�V8+2c�i8)=��G4?>?1L��Hr�)=i�G= H"�A=�bG���5F ���GbG134$138+=�^?CDH���"�A="�13='����=�4$1L��13�G4P�A���D`)13q-�G=���G2c�A��13q-�G2L#��8V��H ��%A=�����Ab���138+=hb0H"�A=�= �G2F�8+F !�2c�A��138)= ^�CDH����/�$��8)���"�A��4�13=�bG23!�� �D��H���46�0����1346��1cbG�)2���!�b���!��A��138+= 4�)=��v��H �e� 134$F�����4$138)=l8):D��H �h���)="�v13='����=�4$1L�Y#v�A2c8)=�`@��H �{�Z� �"�A="�F�2c�������)!�^

TD�)=��1� TD�A="�ë TD�A="�¤� TD�A="� : TD�A="� %� 9 o � � 9 � ( 9 o � ('9 o � ('9 % �

� � 9 % � �-, � *)(Z� 9 ( � �-,*I�� 9 : � �-,�� * :`�'9 o7� �-,* o % 9 : � %+,�� *)* 9 % � �-,

� 9 % � %+, � (+*'9 � �-, � �Z� 9 � � �-,� o+o 9 % � %+, � %��'9 o7� :_, � � 9 � �-,

� o 9 * � �+, ��()( 9 ( � %+, � *+( 9 � � �-, ����� 9 � � :_, ��(I��'9à� � �-,��(���% 9 � �-, ��( : 9 � �-, ��(��+( 9 : � �-, �G( :_% 9 � �-, � ��( ('9 � � �-,��( o *'9à� � �-, ��()* � 9 � � �-, ��()*` 9 � �-, �G( � � 9à� � �-,�� �I����*'9 : � �-,�I�)('9 o7� �-, �I�<�` 9 % � �-, �I�<� :'9 � � �-, �I� :&� 9 � � %+, �I� o+o 9 * � �-,���I� :�9 % � �-, �I�G*+('9 % � �-, �I�G* :'9 � �-, ��� � ( 9 o � :_,�� ��s��% 9 : � �-,��� 9 * � �-, ����+('9 ( � �-, ���:s 9 * � �-, ���:-( 9 � � :_, �� o % 9 � �-,����A*+('9 ( � �-, ��A*+('9 � � �-, �� � � 9 � � �-, �� � ( 9 � � �-, ���� o 9 : � �-,������+('9 * � �-, ����` 9 � �-, �� :_% 9 ( � �-, �� :&� 9 � :_, �� o+o 9 : � �-,��)*` 9 � �-, �� � � 9 ( � %+, �� � 9 � � �-, �<� � 9 � :_,�� ��:Z� � 9 % � :_,����:` � 9 ( �\o ,m��: : :�9 % � � 9 (-,m��:I� � 9 ( � � 9 (-, � : :`� 9 o � %+, � ��: ( 9 � � 9 (-, �

��:-*I 9 ( � � 9 (-,m��: � *'9 ( � � 9 (-, ��: � o 9 � � � 9 (-, ���%�� :-( � � 9 (-,