Upload
others
View
1
Download
0
Embed Size (px)
Citation preview
PROCEEDINGS OF THE
NUCLEAR PHYSICS AND SOLID STATE PHYSICS SYMPOSIUM
BOMBAY, DECEMBER' 28-31, 1978
VOLUME 21C
SOLID STATE PHYSICS
ORGANISED BY THE
DEPARTMENT OF ATOMIC ENERGY
GOVERNMENT OF INDA
UH!VERc:!TATSB!BL.!OTHEK• :.'• :; •.'Ver
TF.C: '"' 8C!-!E
INFORWIAnONSBiaiJOTHEK
CONTENTS
L LOW TEMPERATURE PHYSICS AND SUPERCONDUCTIVITY
1. Electrical Resistivity of Indium Sulphide (INS)Crystals T3own to 4. 2 K and upto 80 K. Bar :
A. K. Bandvopadhvav. A. K. T. Oza, M. R.
Madhava, H. L. Bhat, R. Srinivasan and
E. S. R. Gopal. i
2. Superconductivity in Scandium-Zirconium Systems :
Sushil Auluck and G. S. Singh. 4
3. Variation in Amplitude of Microwave Induced Steps
in Current Voltage Characteristic of Clarke Solder
Blob Junctions with Microwave Power and Frequency:
V. S. Tomar, N. D. Kataria, Madhu Prasad and
A. K. Gupfa. 6
4. Hotspot Induced Anomalies and Hysteresis in Long
Superconducting Ag-Sn Proximity-Effect Bridges :
G. Dharmadurai and B. A. Ratnam. 9
5. Fhouon-Injection-Induced Nonequilibrium Phenomena
in Superconducting Proximity-Effect Bridges :
G. Dharmadurai and B. A. Ratnam. 13
6. Electron Phonon Coupling Constant and Critical
Temperature of Some A15 Compounds of Nb and
V : M. Ray Chaudhory, P. Chatterjee and
S. Chatteriee.lfe
7. Study of Cryosorption of Nitrogen -C-onden«sd Carbon-
dioxide Layers : V. Venkataramanan, G. Rangarajan
and R. Srinivasan.19
8. Study of Lead-Lead Oxide-Lead* Tunnel Junctions :
Madhu Prasad, A.K. Gupta, N.D. Kataria and
V. S. Tomar." 22
H. ELECTRONIC PROPERTIES OF SOLIDS
1. Positron Annihilation in Oriented Single Crystals -
Two Photon Angular Correlation : P. Ramaswamy,
F.D. Gnanam, S.Krishnan and G. &. Laddha. 25
-1-
-ii-
gafje
2. Two Parameter Positron Life Time and Momentum
Correlation Studies in Solids and Liquids : P. Sen
and N. Panigrahi. 29
3. Positron Lifetime Studies in Some Enzymes :
H. Prasad, K. P. Singh and P. C. Jain. 32
*4. Nature of Chemical Bond Through Positron
Angular Correlation : S. Ramasamy,V. M, Kanagasabapathy and T. Nagarajan 36
*5. Positron Annihilation in Polycrystalline CaF, and
CdF : T. Nagarajan and S. Ramasamy 37
6. Auger Studies of Transition Metal Oxides :
D. D. Sarma, M.S. Hegde and C. N.R. Rao 39
7. X-ray Absorption Study of 5d States and Chemical
Shift of L2 and L- Discontinuities of Eu (Z * 63)in some Organic Complex : Dhanesh Jain,
K. B. Garg and B. K. Sharma 42
+8. Dynamic Spin Susceptibility of an Interacting
Electron Gas : S. K. Chowdhury and S, P. Mohanty • 45
+9. Screening of a Static Charge in Electron Liquid :
R. P. Singh and M. Yussouff 49
+10. Life Time Effects on the Study of Dynamic Structure
Factor of an Electron Liquid : B. K. Rao,S. S. Mandal. and D. N. Tripathy. 52
+11. An Indication of a New Mode of Collective Excitations
in a Many Electron. System : D. N. Tripathy,R.K. Pal and S. S. Mandal. 56
+ 12, Electron Correlations in Classical Plasma :
G. S. Dubey and B.K. Chaturvedi. 61
+13. Influence of Electron Exchange Energy on X-rayFlasmon Scattering by Solids : K. S. Srivastava,D. K. Harsh and V. Kumar. 64
(Papers 8 to 13 were rapporteured byOr. P. Bhattacharyya).
-iii-
Page
14. Comments on the Nature of Effective Interactions
between Two Plasmons : S. S. Mandal and
D. N. Tripathi. 67
+15, Theoretical and Experimental Study of Electronic
Structure of Oi -Zr : Y. K. Vohra, S. K. Sikka and
R. Chidambaram. 70
+ 16. Band Structure of Vanadium : K. R. K. Gandhi
and R. M. Singru, 77
+17. Relativistic Energy Bands of Indium by RKKRZ
Method : J. Chowdhury, P. Chatterjee and
S. Chatterjee. 77
+ 18. Band Structure and Superconductivity of Technetium :
R. Asokamani, K. Iyakutti and V. Devanathan, 80
+ 19. Study on the Effect of Correlation in Bandstructure
of Metals : K. Iyakutti, R. Asokamani and
V. Devanathan. 83
+20. Correlation of Band Structure of Cobalt with K-
Absorption Spectra : B. D. Shrivastava and
N. K. Mahajan. 86
+21. Electron Energy Bands of Some Ag-Cd Alloys :
N. C. Debnath, M. Raychowdhuri and S. Chatterjee. 89
+22. Electronic States in s-d Model with Realistic Hybridi¬
zation : S.K. Ghatak and R. K. Moitra. 92
(Papers 15-22 were rapporteured by
Dr. G. Mukhopadhyay).
23. Magnetic Hyperfine Field in Ferromagnetic Nickel
Metal : N. C. Mohapatra and T. P. Das. 95
24. On the Quantum Mechanics of Electrons in a
Magnetic Field : Some New Results : R. Ray.
25. Non-Perturbative Approach to the Coupled Electron-
Optical Phonon System : T. K. Mitra and S. Dhar.
98
102
*26. Equation of State of Thorium : B. K. Godwal,
S.K. Sikka and R. Chidambaram. 1°5
IV-
Page
+27. Measurement ot Traps at the GaAa - Native
Oxide Interface by Transient CapacitanceTechnique : B. M. Arora, S, S. Awade and
A.M. Naraale. 106
+28. Measurement of Capture Cross Section of peepLevel Impurities in F-n Junctions :
V. Kalyanraman and Vikram Kumar. 110
+29. Effect of TQ Anomaly on Large Area SchottkyBarrier Diodes : G. S. Viawaswaran and
R, Sharan, 114
+30. Formation of Surface- States : S. P. Singh,S. S. Kushwaha and Keshaw Singh 117
+31. The Effect of Temperature on the MOS Photo-
capacitance Peak : M. Mohan Chandra and
•>' a Suryan. 120
+32. Effects of U-V Radiation on Oxidised Silicon
Surfaces and Planar Devices : S.K. Singh,R.S. Srivastava and Keshaw Singh 124
(Papers 27-32 were rapporteured byDr.K. C* Rustagi).
*33. Phoiocapacitance Studies in Schottky Diodes :
R.N, Sreenath and M. Mohan Chandra. 128
*34. Impurity States in GaP : M. Robert Singh and
S. Balasubramanian. 129
*35. Structural Studies of Indium Telluride Films
Formed at High Temperatures : D. V. K. Sastryand P. Jayaraman Reddy. 130
*36. A Study of Surface Properties of Tin Doped Gallium
Arsenide at High Frequencies : V.K. Farkya,Devendra Singh and N. L. ForwaL 131
*37. Parametric Excitation of Acousto Helicon Waves
in Piesoelectric Semiconductors i S. Guha,
P.K. Sen and S. sGhosh. 132
-v-
Page
*38. Oscillating Two-Stream Instability in a Two-
Hole Species Semiconductor : S. Guha,
P. K. Sen and S. Ghosh. 133
*39. Modulational Instability oi a Laser Beam in a
Piezo Electric Semiconductor : S. Guha, P. K. Sen
and S. Ghosh. 134
*40. Studies on the Doping of Silicon with Phosphorus
Through Nuclear Transmutation : O. P. Nangia. 135
*41. Temperature Dependence of Field Effect inMOS
Structures : C. P. Sridhar and J. Majhi. 137
"42. Modification of Silicon Surface Using Ion-Beam
Techniques and It's Properties : A. D. Yadav and
M. C. Joshi. 138
"43. Spectral Response of Schottky Barrier Solar
Cells : C. Francis Xavier and G.A. Savari Raj. 141
"44. Numerical Analysis of Silicon PN Junction Solar
Cell : P. Caleb Dhanasekaran and B. S. V. Gopalam. 144
"45. The Effect of Hydrostatic Pressure On the Capaci¬tance - Voltage Characteristics of p-n
Junctions : K. V. Ramana Rao and M. Mohan Chandra. 147
"46. Microwave Conductivity of n-Type Germanium in
the Presence of Instability : S. Guha and N. Apte. 150
"47. Electronic and Optical Properties of Crystallineand Amorphous Si and Ge : M. Nandi and
S. Chatterjee. 153
"48. Photoemissive Quantum Yield for Semiconducting
Thin Films : C. Ghosh and B. P. Varma. 156
"49. Theoretical Calculations of Silicon Surface
Structures : John Ridgway and M. L. Sheela. 159
"50. Electronic Dielectric Constant of IH-V Semi¬
conductors : J.K. Sharma and D. C. Khan. 162
-VI-
Pan
"51. Semiconducting Properties of Low-Dimensional
Poly-Iodine Chain Complexes : A. K. T. Oza,
A. K. Bandyopadhyay and S. V. Subramanyam. 165
"52. Electrical Resistivity of Low- Dimensional Poly-
iodine Chain Complexes Upto Eighty Kilobar
Pressure : A. K. T. Oza, A. K. Bandyopadhyayand S, V. Subramanyam. 168
"53. Temperature Gradients of Energy Gaps of
Degenerate Semiconductors : D. K. Roy and
R. Y. Thakur. 171
"54. Dielectric Screening in GaP : M, Robert Singh
and S. Balasubramanian. 175
"55. Helicity and Heteroatomic Effect on the Energy
Band Structure of One-Dimensional Conductor (SN) :
S. C. Mathur and S. Mitra."
178
"56. Excess Electron and Excess Hole Mobilities of
s-Tetrazine. A Candidate Material for Organic
Photovoltaic Systems : S. C. Mathur, Keys Royand B. Kumar. 181
"57. Exciton Dissociation at Phthalocyanine - Iodine
Interfaces : S. C. Mathur and S. Mitra, 184
"58. A Simple Method of Preparing ZnO Films on
Glass : T. K. Chaudhuri, H.N. Bose and
H.N. Acharya. 187
59. PTCR Effect in Barium-Strontium Titanate Doped
with Lanthanum : N. Hebbare. M. J. Patni and
C. Srinivasan. 190
60. Electrical Conductivity and MicrohardneBS of
Single Crystals of Different Materials :
J. R. Pandya and C. T. Acharaya. 193
61. Electrical Properties of Synthetic and Natural
Calcite Crystals : S. Krishnan, F. D, Gnanam,
P. Ramasamy and G. S. Laddha, 198
- vii-
62. Electrical Resistivity Variation with Field of
some Ferroelectric Perovskite Crystals :
K. R. Bagree, D. A. Deshpande and V. G. Kher. 202
63. Electrical Properties of NiS04' 6H O Crystals :
Pushpa Nandi. D. A. Deshpande and V. G. Kher. 206
64. On Electrical Resistivity of Alkali Metals :
J. P. Dixit and K. N. Mehrotra. 210
65. Spontaneous Electric Current from a Sandwich
Cell Made of Metal Electrodes and the Endocarpof Citrus Fruits : P. K. C. Plllai and M. Mollah. 213
66. Electrical Condajifcivity of Zinc Phosphide :
K. R. Murali and D. R. Rao. 217
67. Electrical Resistivity of Thin Bismuth Films :
Kazi A. Motakabbir and S. M. M. R. Chowdhury. 221
68. Planar Hall Effect in Bismuth Films : Samir
Bhattacharyya and V. Javaraman. 224
69. Electromigration Failure in Silicon Planar Devices : 228
Beniere F. and Viswanatha Reddv K.
70. Thermally Stimulated Depolarisation Currents in
Amorphous AS2S3 Materials : M. Datta, P. N. Baneriee
and D. L. Bhattacharya. 232
*71. Electrical Breakdown in Thin As2S3 Films :
P.N. Banerjee, M. Datta and D. L. Bhattacharya. 236
*72, Tunnelling Probability Across a Schottky Barrier :
D. K. Roy and P. N. Singh. 237
*73. On the Limits of Resolution of Field Emission and
Ion Micorscopes : D. K. Roy and P.N. Roy. 239
*74. Effect of Heat-Treatment on the Photosensitivity of
PbSe Films : Swapin K. Datta, A.K. Chaudhury
and H.N. Bose. 240
*75. Applicability of Band Model to P. Benzoquinone :
S. C. Mathur, S. Kumar and Keys Roy. 241
"-V11.1-
PMe*76. Study of Photodielectric Effect in Pure ZnTe :
P. K. C. Pillai and Shobha Chanderasekhar. 242
*77. Studies on the SDR IMPATT Diode Made of GaP
B. B. Pal and D.N. Datta. 244
*78. Effect of AC and DC Electric Fields on CaS04 :
Sm Samples : S. G. Sabnis, M. R. Mulla,-
R. D. Lawangar and S. H. Pawar. 245
*79. Field Assisted Conduction Mechanism in Tellurium
Dioxide Films : D. K. Jain and J. C. Garg, 246
*80. Depolarlsation Current Studies at High Tempera¬ture and Low Fields : P. G. Mehendru, K. Jain
and N. P. Gupta. 247
*81. Studies of Charge Storage Mechanism in PVB Thin
Films : Naresh Kumar, K. Jain and P. C. Mehendru. 249
*82. Hysteresis in Bi203 Capacitors ; S. Singh,
V.K, Saxena, S.'L. Pandey and R. N. Sax.s!na. 250
*83. Thickness Dependence of Breakdown Field in
Evaporated Stearic Acid .Film Capacitors :
R. Kasilingam, C. Balasubramanian and
M. Radhakrlshnan. 251
*84. Thickness Dependence of Thermoelectric Effect
in Thin Cu-Ni" Films : M.A, Angadi and
A.M. Karaguppikar. 252
*85. Thermoelectric Effect in CaSO. : Dy :
S. H. Pawar, S. H. Jagdale, C.N. Jadhav,A. G. Shikalgar and B. B. Bargale. 253
*86. Grain Size and Grain Density Variation in Tin
Thin Films aue to Changes in Deposition Rate
and Vacuum during Deposition : V. Damodaradas. 254
*87. Electrical Resistivity Study of Some Gallium -
Manganese Spinels: P. D. Bhalerao and
V. M. Gokhale. 256
*88. Temperature Variation of the Barrier Parameters
in Al-AUOj-Al Tunnel Junction at Low Voltages :
M. S. Jagadeesh and Damodara V. Das. 25S
-ix~ ii££.
*89. Effect of Band-Filling on the Dimerization o£ a
One-Dimensional Metallic Chain : S. Chatterjee. .259
*90. Electrical Properties of Mannich Base Poly¬mers : P. S. Viswanathan, K. L. Taneja and
Padma Vasudevan. 260
*91. Electrical Properties of HgO : P. K. C. Pillai
and Shobha Chanderasekhar."
262
*92. Effect on IN-SITU Annealing on Optical and
Electrical Properties of MnBi Films : P. C. Achar
and R.N. Karekar. 264
*93. Electrical Conductivity of Coper Oxide Thin Films
at Microwave Frequency : A. U. Patll, S. R. Sawant,
J.I. Powar, A. Y. Khot and R.N. Patil. 266
*94. Annealing Study of Electrical Resistance and the
Variation of Defect Density with Deposition Rate
in Silver Films : K. Narayaadas, M.. Radha-
krishnan and C. Balasubramanian. 267
*95. Electrical Properties of Bi? O, Layers Under
Reduced Pressure : S. L. Fandey, S. Singh and
R.N. Saxena. 268
*96. Deposition Temperaure Effect on the Electrical
Properties of Tin Films : M. Ranganatham Chetty,
M.K. Sundaram and S. Mohan. 269
*97. Energy Gap Variation with Thickness in Vacuum-
Deposited Cadmium Tellurlde Thin Films :
V. Damodara Das and N. Jayaprakash. 270
*98. Low Temperature Electrical Conductivity of Tin
Films Vacuum-Deposited at Liquid Nitrogen
Temperature : V. Damodara Das and N. Jayaprakash. 272
+99. Preparation of Thin Bi O Films by Controlled
Oxidation and Measurement of Their Microwave
Transmission and Reflection Coefficients :
A. M. Fegade and R. N. Karekar. 273
JEaga.
*100. Effect of Pressure on the Electrical Resisti>-
vities of Some Ternary Rare Earth Compounds :
V. Vijaya Kumar, E. V. Sampatkumaran and
S. N. Vaidya. 275
101. R. F. and Microwave Behaviour of the Dielectric
Properties of the Single Crystal Double Sulphates :
'O.-S. Josyulu, B, Jayaram and J. Sobhanadri. 276
102. Effect of Pressure on Pyroelectric Property of
Poly (Vinylidene Fluoride) : .H. V. Tiwary and
J. C. Burfoot. 280
103. Anomalous Electrical Conductivity of Ferroelectric
Poly (Vinylidene Fluoride) : G. D. Sao and
H. V. Tiwary. 284
*104. Can Phthalocyanlnes be Pyroelectric? :
H. V. Tiwary and J. C. B.urfoot, 288
#105. Electrical Conductivity of Ammonium Selenate
Single Crystals : K. P. Sarabhai and H. V. Tiwari. 290
*106. Growth and Some Dielectric Properties of Pure
and Dopped TGS Crystals : A. K. Batra, S. C. Mathur
and A. Mansingh. 292
*107. Effect of Ortho, Meta - and Para-Nitroaniline
Admixtures on Dielectric Properties of TGS
Crystals : A. K, Batra, S, C, Mathur and
A. Mansingh. 294
*108. Dielectric Properties of Tin(Sn) Doped KC1 :
B. S. Acharya and M. L. Mukherjee. 295
*109. Dielectric Loss in RbCl Mono Crystals Dopedwith Co2+ Ions : S. K. Gupta and S. D. Pandey. 299
*110. The Effect of Thickness on the Dielectric Proper¬ties of Lanthanum Oxide Thin Films :
T. Mahalingam, M. Radhakrishnan and
C. Balasubramanian. 301
*111. Electrical Conductivity in Potassium Nitrate :
N. Hariharan and C. Satyamurthy. 303
-xi-
HI. OPTICAL PROPERTIES OF SOLIDS
"I. Isothermal Stability of Colour Centres in Micro
crystalline Ca Doped KC1 : V. S. Kamavisdarand B. T. Deshmukh.
"2. Effect of Particle Size on Isothermal Decay of
Colour Centres of V -Irradiated KBr :
D. G. Wakde, S. V. Mohril and B. T. Deshmukh.
"3. Optical Absorption Studies on Suprapure and
Calcium Doped Single Crystals of RbCl ;
S. B. S. Sastry and S. Sapru.
"4. Radiation Damage Studies on CrO., DopedAlums : B. V. R. Chowdari and V. Ravi Sekhar.
"5. Negative Molecular Sulphur Ion Centres in
Cesium Bromide ': S. Radhakrishna and
K. Hariharan.
"6. The Pressure Derivative of the High FrequencyDielectric Constant of Alkali Halide Crystals :
Lalit K, Banerjee and A. N. Basu.
"7. Quadratic Electro-Optic Effect (Kerr Effect) in
Doped KCL Crystals : Geetha Balakrishnan and
K. Srinivasan.
"8. Dipolar Coupling in NH3 and ND3 Crystals :
P. Muthusubramanian and N. Krishnamurthy.
+9. A Comparative Study of the Infrared Spectra of
Optical Phonons in (NH4), Mil (S04),, 6H20 (MCo, Ni, Mg) : S. P. Gupfa, • B. SingE,P.N. Asthana and B.N. Khanna.
+10. The Vibrational Spectra of SrXg. 6H20 (X = CI,
Br) : B. Singh, S. P. Gupta and B.N.Khanna.
+11. The Dynamics of Sulfate and Water Units in
CuS04. 5H,0 and its Deuterated Analogue :
B. K. Srivastava and D. P.Khandelwal.
-Xll- Page
+ 12. Absorption Studies of Vanadyl Ion in
K C O .H O : S. Radhakrishna and M. Salagram. 339
+13. Crystal Dynamics and IR Spectra of Barium
Bromide Dihydrate : B. Singh, B.N. Khanna
and Y. S. Jain. 342
+14. Infrared Absorption of Aphthitallte, KNaSO :
S. Alam and J. P. Srivastava. 345
(Papers 9-14 were rapporteured by Dr. Y. S. Jain)
*15. Structure of the A Band in Thallium DopedAmmonium Chloride : V. B. Sharan, D. N. S.
Srivastwa and S. C. Sen. 348
16. Exciton - Exciton Interaction in CdS : S. M. Oak. 349
17. Effect of Particle-Hole Excitations in the
Absorption Spectra of Thin Metal Films :
G. Mukhopadhyay and S. Lundqvist.
18. On the Excitonic Absorption in CdS :
G. Mukhopadhyay. 355
19. Effect of Spatial Dispersion on the Optical Propertiesof Solids : G. Mukhopadhyay. 359
*20. Structural Optical and Electrical Properties of
Thin CdSe Films : R. Thangaraj, F. K. Tewari,
A.K. Sharma, B. K. Gupta, O. P. Agnihotri and
S.S. Mathur. 362
*21. Electroluminescence of SrS : Cu:Zr Phosphors :
D. P. Kulkarni, S. S. Kaveeshwar, P. S. Cbowdharyand P. C. Kamara. 363
*22. Enhancement of Red Emission of ZnS : Cu, Bi.Fe :
P. D. Ekbote and J. K. Zope. 364
*23. Electro-Optic Properties of CdTe ! Ashok Kumar
and T. P. Sharma. 365
24. Thermoluminescene and Effects of Heat-Treatment of
Yellow and Colourless Fluorites : V. K. Jain and
S. Mitra. 366
-xiii-
*25. Colour Centres in LiF Single Crystals with
X- ray Irradiation : H. B. Gon.
*26. Quenched Ageing of Thin Film Deposits byChopping : R.K. Puri, K. Vijaya and
R. N. Karekar.
"27. Optical Properties of Alkali-Doped CdS Thin
Films : A. G. Shikalgar, B. B. Bargaie and
S. H. Pawar.
"28. Photothermoelectric Effect in Chemically
Deposited CdS Thin Films : B. B. Bargaie,A. G. Shikalgar and S. H, Pawar.
"29. Effect of Air Baking and Substrate on the Photo¬
sensitivity of PbTe Films A, Vijaya Kumar and
A. K. Chaudhuri. 376
"30. Photoconduction in Anthraquinone Dye Thin Films :
M. R. Padhye, T. S. Varadarajan and L. N. Chaturvedi 379
"31. A "Photoconductlve Film- for Vidicon Target:R. C. Bapna and B. P. Varma. , 382
"32. Defect Formation in CdS : Cu due to Electron-
less Discharge : P. D. Ekbote, J. K. Zope, 385
"33. Measurement of Surface Roughness Using Return-
Path Ellipsometer : C. E. Sooriamoorthy. 387
"34. Multiple Beam Interferometic Studies of Percussion
Figures on (100) Cleavage Planes of Single Cristals
of Sodium Bromide : M. H. Ansari and S. C. Datt. 390
"35. Electrical Conductivity of Superionic Solid
Rb Ag4_xCu Ig Films : K. Hariharan. 394
"36. Electronic Spectra of Superionic Compound
KAg.I Films : K. Hariharan. 39764 s
IV. DYNAMICAL AND THERMAL PROPERTIES OF
SOLIDS AND LIQUIDS .
+ 1. A Theory of Nematic to Isotonic Transition in
Liquid Crystals Forming Dimers : V. K. Kelkar,
C. Manohar and J. V. Yakhmi. 400
Page
367
368
369
373
-XIV-
Page
Tilt Angle Measurements in the Smectic C (Sc)and Nematic (N) Phases of HxBABA and NBABA :
K. Usha Deniz, A. S. Paranjpe, P. S. Parvatha-
nathan and E. B. Mirza. 404
Electric Field Induced Instabilities in MBBA :
K. Usha Deniz, P. S. Parvathanathan and
A. S. Paranjpe. 407
Positron Lifetime Studies in the Various Phases
of the Liquid Crystal Cholesteryl Oleyl Carbonate :
M. B. Kurup, R. P. Sharma and B. V. Thosar. 411
Mossbauer Investigations in a Liquid Crystal at Low
Temperatures : R. P. Sharma, M. B. Kurup and
B. V. Thosar. 414
Molecular Motion in the Solid Phase Nematic Liquid
Crystal: G. K. Gupta, V. P. Arora, V. K, Agarwaland A. Mansingh. 417
Structure of the Smectic Phase of 4'-(N (P-Fentyloxy-carbonyl, Oxybenzylidene) Amino) Valerophenone :
B. Bhattacharjee, A. Zeminder and S. Paul. 420
(Papers 1-7 were rapporteured by Dr. C. Manohar)
Elucidation of Structural Parameters of Solid Hydrated
Soaps Trhough X-ray Diffraction :M. K. Nagarajan and
R. P. Angadi. 423
EPR Study of the Temperature Dependence of
Molecular Alignment in a Smectic Liquid Crystal :
V. G. Bhide, S. K. Gupta and S. R. Singhal. 126
A New Approach to the Calculation of the Order
Parameter of Nematic Liquid Crystals : Ranjlt Paul 428
SAXS Study on the Damaging Effect of 1% Hard
Water on Macromolecular Parameters of Proeinous
Tussah Silk Fiber : A. Patel. 429
The X-ray Crystallinity and Orientation of Indian
Silk : N. V. Bhat, G. S. Nadiger and A, Venkatraman. 431
-XV-
Pag
*13. Dielectric Relaxation Behaviour in Two Compo¬
nent System : A. K. Sharma and V. K. Agarwal. 434
*14. Origin of Ultrasonic Absorption in Liquid .-Ukali
Metals : O. N. Awasthi and S. Sathish. 435
*1.5. Ultrasonic Attenuation in Single Crystal Alumi¬
nium : M. Subramanyam and V. Padmanabha Sarma. 436
"16. Lattice Dynamics of (NH.) CuCl4"2(H20) :
S. L. Chaplot and V. C. Sa^ini. 437
"17. Translational Fhonons Dynamics of ND41 in the
NaCl Phase at Room Temperature : A. N. Pandeyand K. S. Upadhyaya. 440
"18. Second Order Doppler Shift for Dislocations
Produced by Impurity Radiating Nucleus : Debadideb
Bhattacharya, S. K. Roy and D. L, Bhattacharya. 443
"19. Concentration Dependence of the Mixed CrystalBehaviour : A CPA Theory : P. Nayak and
S.N. Behera. 446
"20. Oscillations in Pair Mode Frequencies and the
Width of Impurity Modes : S.N. Behera and
N. Chandralekha Devi. 450
"21. Elastic Constants of the NaCl Structure Crystals
Containing Impurity Ions : R. Sebastian and
G.A. Savari Raj. 453
"22. The Third Order Elastic Moduli of Aluminium
Magnesium Alloys : V. Kesava Raju and
P, Jayarama Reddy. 456
"23. Study of the First Order Pressure Derivative of
the Bulk Modulus of Rare Gas Solids : Sushma Lehri
and M. P. Verma. 459
• "24. Methods of Homogeneous Deformation for Elastic
Constants of Metals t D. Sen, S. K. Sarkar,
S.K. Das, D. Roy and S. Sengupta. 462
"25. A New Approach to Estimate the Coupling Constant
Using Mossbauer Data : Deo Raj.
- XVI-
"26. Effect of Volume Forces on Lattice Dynamicsof Transition-Metal Corabides : H.N. Gupta
and R. S. Upadhyaya. 468
"27. Role of Three-Body Forces in Lattice Dynamicsof Neodyium Antimonide : H. N. Gupta and Kanti
Chandra. 471
"28. Dielectric Constant of Pbl2 .Single Crystals :
D. P. Yadav, K. V. Rao and H\ N. Acharya, 474
*29. Spin-Phonon Scattering in ErVO in ParamagneticPhase : V. P. Srivastava and G*S. Verma. 477
*30. Defect Modes due to H_- H_ and D -D Pair
Impurities in KCl : R. K. Gupta, P. Mathur and
A.K. Singh. 478
*31. Third-Order Elastic Constants of Copper, Silver
and Gold : B. P. Barua and S.K. Sinha. 479
*32. Energy Contributions to. the Second-Order Shear
Elastic Constants of Dilute Au-Ni Alloys :
B.P. Barua and S.K, Sinha. 481
*33. Many-Body Effects on the Second Order Elastic
Constants of Solids with the CaF2 Structure :
S. S, Bedi and M. P. Verma. 482
*34. Lattice Solitons in a Diatomic Chain : P. C, Dash
and K. Patnaik. 483
*35. Inter-Ionic Pair Potential : Exchange and
Correlation Effect : P. L. Srivastava,R. Chaudhary and J, R. Singh. 484
36. Phonon Conductivity of p-Type Semiconductors for
Random Strains : Surendra Singh and G. S. Verma. 485
37. Anomalous Effects of the Magnetic Field on the
Phonon Conductivity of Lightly Doped N-TypeSemiconductors : Surendra Singh and G.S. Verma. 488
38. Phonon Scattering by Holes in Doped GaAs :
M. Singh. (Presented by Surinder Singh) 491
-XV11-
Electron-Phonon Scattering in Zn-Doped GaSb :
V. Radhakrishnan and P. C. Sharma. 494
Relaxation Rate for Phonon Scattering by Point
Defects Under Anharmonic Crystal Fields :
V. Radhakrishnan and P. C. Sharma. 497
Thermal Desorption of Lanthanum Hexaboride from
Tungsten Surface Using Field Emission Micro¬
scopy : C. V. Dharmadhikari, D. S. Joag and
P. L. Kanitkar. 500
Studies on the Gettering Action of YF, : U.Kumar,
Satyandra K. Agarwal, N. L Singh and A. K. Nigam, 503
Scattering of Phonons by Cluster Defects :
Y. P. Joshi. 504
Density-Fluctuation-Limited Phonon Mean Free Path
in Amorphous Solids : Y. P. Joshi and D. P. Singh. 509
Effect of X-ray Irradiation on Thermal Expansion of
KCl Single Crystals : A. K. Gupta. A. Subrahmanyam
and K. V. Rao. 513
Temperature Dependence of Thermal Expansionand Debye Temperature of KBr : KCl Solid
Solution by X- ray Diffraction : N. M. Pandya,B. P. Agarwal and N. P. Shah. 515
MAGNETIC PROPERTIES OF SOLIDS
A New Approach to Electron Localization in Dis¬
ordered Systems : R. S. Tripathi. 516
Electronic Density of States of a Binary Alloy in a
Cubic Lattice Including the Effects of Diagonak and
Off-diagonal Disorder : P. Chaudhuri and
R.K. Moitra. 519
On the Fermi Level of System with NegativeCorrelation : C. R. Natoli, B. K. Chakraverty
and S.K. Ghatak. 522
-XVIXX- Zage
Local Environmental Effects in the Coherent
Pseudopotential Approximation : Meena
Chaturvedl, Vipin Srivastava and S.K. Joshi. 525
Application of Multiband CPA to the Ferro¬
magnetic Ni Ru.0
' Alloy : R. Chakravarthy,
P. Chaddah and L. Madhav Rao. 529
Magnetic Susceptibility of Elemental Amorphous
Semiconductors : N. C. Das. 532
Effect of Fluctuations on the Order Parameter and
the Transition Temp, in Spin Glasses : Satish K. Das
and S.K. Joshi.'
- 535
Critical Properties of the Dilute Heisenberg Magnet :
M. Berma, D. Kumar and R. B. Pandey. 538
(Papers 1-8 were rapporteured by Dr. Vipin Srivastava)
Evidence for a Spectrum of Freezing Temperatures
in a Cluster Spin Glass System ; A. K, Grover.
C. Radhakrishnamurthy, S. K. Malik and
R. Vijayaraghavan. 542
Mixed RareEarth Intermatelics - Ideal Spin Glass
Systems? : A. K. Grover. S.K. Dhar, S.K. Malik
and R. Vijayaraghavan. 546
Cusps in Low Field AC Susceptibility of Ferro¬
magnetic Heusler Alloys : S.K. Dhar, A. K. Grover,
S. K. Malik and R. Vijayaraghavan, 549
Sensitivity of the Curie Temperature to Single Ion
Anisotropy ;, R. Brahmachari and
K. G. Chakraborty. 552
Critical Properties of Spin One Biquadratic XY
Model : G. Chaddha. 555
AB Initio Calculation of Exchange Enhanced Susce¬
ptibility of Alkali Metals : S.K. Misra and
P.K. Misra. 558
-^lX-Page
+15. Chemical-Bond Approach to the Magnetic Suscepti¬bility of Tetrahedral Semiconductors : T. Sahu
and P. K. Misra. 562
+ 16. Magnetic Susceptibility o£ Doped Narrow-GapSemiconductors : G. S. Tripathi and P. K. Misra. 566
+ 17. Temperature Dependence of Magnetic Suscepti¬bility in Nickel : Ramjit Singh, Joginder Singh and
Satya Prakash. 570
(Papers 12 to 17 were rapporteured by Dr. P. Rudra)
18. Hyperfine Interactions in Rare Earth Iron
Oxides by Mossbauer Effect Method : A. Narayanasamy,T. Nagarajan, P. Muthukumarasamy and
N. Kimizuka, 574
*19. Mossbauer Studies on Ni„ Cu, Fe„0, Spinelx i-x 2 4
System : P. Muthukumarasamy,T. Nagarajan and A. Narayanasamy. 577
=1=20. Mossbauer Studies on Disordered Binary Alloys :
A. Narayanasamy, T. Nagarajan, P. Muthu¬
kumarasamy and T. S. Radhakrishnan, 578
21. Measurement of Quadrupole Splitting in Some
Non Cubic Iron Based Alloys : V. Anila,
H. C. Verma, D. K. Gupta and G.N. Rao. 579
57 -•
22. Study of Quadrupole Interaction at Fe in Zir¬
conium Metal : H. C. Verma and G. N. Rao. 583
23. Measurement of Quadrupole Interaction
Frequencies (QIF) of 5'Fe in Non-Cubic Host
Metals : V. Anila, H. C. Verma, D.K. Gupta
and G.N. Rao. 583
24. Study of Quadrupole Interaction in Ferrite Spinel
CdFe O : S. H. Devare and H. G. Devare. 5882 4
181*25, Quadrupole Interaction at.. Ta in Te Metal :
S. H. Devare and H. G. Devare. 590
-XX-
*26. Magnetic Susceptibilities of RFe O Systems
(R = Ho, Er, Tm, Yb, 2Y, Luf2 : Paul
Baynes, B. Viswanathan, A, Narayanasamy,
N. Kimizuka, N. K. Appanraj and
T. Nagarajan. 592
"27. Ferromagnetic Form Factor in the Canted
Antiferromagnet YbFe_ gjCo ggC>3 :
S.K. Paranjpe and R.'j. Begum, 593
"28. Exchange Constants in Yttrium and Gaddlinium
Garnets : R. Aiyar and C. Srinivasan. 595
"29. Study of Spin-Wave Line-Width of Yttrium
Aluminium Garnets : Om Prakash,
G. Srinivasan and C. M. Srivastava. 599
"30, Low D imensional Magnetic' Behaviour of some
Metal Oxides with K2 NiF4 Structure :
P. Ganguly, S. Koilali and C. N. R. Rao. 603
"31. Magnetic Thermal and Hyperflne Properties of
Ho^+ Ion in Hexagonal Sites in LaCl, : D. Neogy and
A. Chatterji. 607
"32. Magnetic Measurement on Ytterbium Selenate
Octahydrate and a Theoretical Study of its Magneticand Thermal Behaviour : D. Neogy and J. Nandi, 610
3+"33. A Study of the Behaviour of Nd Ion in Lead
Molybdate : D. Neogy and J. Nandi. 613
"34. Electrical Resistivity of Au._ Cu Alloys with Fe
Impurities at Low Temperatures : Girish Chandra,A. W. Shaikh and CM. Srivastava. 616
"35. Hyperfine Studies of Site Occupation in Co.,FeAl and
Fe2CoAl : A. K. Grover, R, G. PiUay, V. Nagarajanand P.N. Tandon. 619
"36. Mossbauer and NMR Studies in FerromagneticRh2MnPb : R. G. PiUay, A.K. Grover, P.N. Tandon
and Le Dang Khoi. 622
"37. NMR Studies on the Antiferromagnetic EuB3 :
M, M. Bajaj and M, Kasaya. 625
-XXX-
Photomagnetic Susceptibility in Bismuth-
Activated CaSO Samples : M. R. Mulla,S. G. Sabais and S. H. Pawar.
Pag
629
Low Temperature Mossbauer Study of Zn Fe-, 0.
System : CM. Srivastava, S. N. Shringi and
M. Vijaya Babu. 632
Mossbauer and Magnetic Susceptibility Studies of
FeQ M Sn/M= Fe, Mn, Co and Nl :
S.K. Kulshreshtha and P. Raj. (Presented byN.K. Jaggi) 637
Experimental Investigation 'of some Coordination
Complexes Using the Eu^l Mossbauer Resonance :
Asharfi Lai. K. Rama Reddy, Arvind and Naseer
Ahmad, 641
Mossbauer Study of Some Trinuclear Iron (III)Benzoate Complexes : D. C, Gupta • N. Nath and
D. M. Puri. (Presented by D.K. Kaushik) 645
Mossbauer Study of Gamma-Induced Polymerisationof Iron Methacrylate : P. R. Sarma. K. C Tripathiand H. M. Gupta. 648
57Resonance Studies of Vacancy Trapeed Fe
Impurity in Solid Solution : Arun K. Tewari,S. K. Roy and D. L, Bhattacharya. 651
Frequency Shift of the Resonance Line for Cubic
Metals Containing Substitutional Impurities :
Arun K. Tewari, S.K. Roy and D. L. Bhattacharya. 652
57Mossbauer Spectra of Co Doped Lanthanum Hexa-
boride : P. S. Joag and A S. Nigavekar. 653
On the Distortion of Fe Octahedra in Mana-
gaaophyllite : R. P. Tr-rpathi, Anjali, Krishna-
murthy and S. Lokanathan. 655
EPR Study of Cu2+ Doped Zinc Malonate Dihydrate :
S. Ojha, K. K. Surendran, R. Rajan, K, V. Lingam
and B.N. Bhattacharya. 656
-xxii-
Page
49, EPR Study of VO Doped Zinc Malonate Dihy-
ydrate : S. Ojha, R. Rajan, K. V. Lingam and
B. N. Bhattacharya. 660
2+
*50. Temperature Dependent ESR of MnTin Zinc Tris-
Ethylenedlamine Nitrate : S. G. Sastry, M. J. Rao,
K. V. Lingam and B. N. Bhattacharya. 663
*51. ESR of Cu in Cadmium Tris-Ethylenediamine
Chloride-A Possible Case of Compressed Octa¬
hedron : S, G. Sastry, M. J. Rao, K. V. Lingam
and B. N. Bhattacharya. 664
*52. NOZ+ Radical : ESR Study in Irradiated Rubidium
Uranyl nitrate : M. V. V. S. Reddy, T. K. Gundu Rao,
K. V. Lingam, M.J. Rao and B.N. Bhattacharya. 666
#53. ESR Study of Mn++ Doped in Cadmium (Imidazole).
(NO )2 : R. K. Sharma, K. V. Lingam, M.J. Rao
and B.N. Bhattacharya. 668
#54, Paramagnetic Resonance Studies of a DifferentiallyColoured Gamma-Irradiated Natural Quartz Crystal :
Harish Bahadur and R. Paxshad, 669
*55. Study of the Paramagnetic Species of Gamma
Irradiated Chloramphenicol : Bijay Bal,
A,K. Roy and Soumen Sarkar. 671
*56. Electronic Structure of Radiation Damage Centre in
Zinc Silicate from ESR Hyperfine Data : C Prasad
and Sulata Chakravarty, 672
57. Proton Spin Lattice Relaxation Studies in Lithium
Ammonium Sulfate, LiNH.S04 : R. K. Shenoy and
J. Ramakrishna. 673
58. Proton Spin Lattice Relaxation Investigations in Sodium
Ammonium Selenate Dihydrate : R. K. Shenoy and
J. Ramakrishna. 676
*59. Nuclear Quadrupole Resonance in 2, 5 Dichloro-
phenol Study of Intramolecular Hydrogen Bonding :
A. Indumathy and J. Ramakrishna. 678
-xxiix-
Page
*60, Bromine Nuclear Quadrupole Resonance of Cyclo-phosphazene Derivatives : R. K. Sridharan,J. Ramakrishna, S. S, Krishnamurthy and
M. N, Sudheendra Rao. 679
*6l. Observation of a Phase Transition ; NQR in
3, 5-Dichloropyridine : S, P. Basavaraju, N. Devaraj,K.R. Sridharan and J. Ramakrishna. 680
35*62. Effect of Impurity on CI NQR in Potassium
Chlorates : S, Aithal, J. Uchil and D. L. R. Setty. 682
*63. Nuclear Quadrupole Resonance in 4, 2-Chloronitro-
toluens : J. Uchji, S. Aithal and D. L. R. Setty. 683
79*64. A Zeeman Study of 7Br NQR Line in Cadmium
Brornate DLhydrate : R. Valli and K. V. S. Rama Rao 685
*65. 59Co NMR Study of Na Co(NO) : M. Bose,
A. Ghosh Roy, A. Basu and K. Roy. 687
*66, llB NMR Studies of Some Rare-Earth Hexaborides :
M. Bose, K. Roy and A. Basu. 688
67. EPR Study of Hyperfine and Quadrupole Interactions
of Cu2+ in Trimethyl Ammonium Cadmium Sulphate :
K. K. Surendran, K. V. Lingam, M.J. Rao and
B.N. Bhattacharya. 689
*68. ESR of V02+ in (NH4)2 (CO) (S04)3 :
B. Jayaram, A. Kumaraswamy, N, Hariharan
and J. Sobhanadri. 692
VI. PHASE TRANSITIONS
1. Phase Transitions in the Compounds, p-n-Alkoxy-benzylidene-p-Amino Benzoic Acids :
A. S. Paranjpe, E. B. Mirza, P. S. 'Parvathanathan,A. L Mehta and K. Usha Deniz. 693
2. Determination of Symmetry and Domain Structures
in Ferroelectric Lithium Ammonium Tartrate
Monohydrate : Akhilesh Kumar Jain and
G. C. Upreti. (Presented by S. D, Pandey). 697
-XXXV-
page
3. Study of Order-Disorder Transition in Nickel-
Iron Alloys by Positron Annihilation :
S. Ramasamy, A. Narayanasamy, T. Nagarajan,
K. P. Gopinathan, C. S. Sundar and B. Viswanathan. 700
4. Infrared Spectroscopic. Study of the Phase Transi¬
tions in CSN03, RBN03 and NH4N03 : J. R. Fernandes,
Somnath Ganguly and C.N.R. Rao. 704
5. Detection of Phase Transition in Insulators by TSC
Technique : S. J. Walzade, J. P. Jog and
S. V. Bhoraskar. 708
6. Transitions in Thiourea-Formaldehyde Resins :
A Study on Electrical and Thermal Properties :
H. S. Nalwa, U. S. Tewari, K. L. Taneja and
P. Vasudevan. 712
*7. Effects of Pressure on Electrical Resistivity of
NbO and Nb02 : S.N. Vaidya, D.K. Joshi and
M. D. Karkhanavala. 715
*8. Effect of Pressure on the Critical Exponent in the
Binary Liquid System CSZ + CHjCN ; K. K. Tiwari,S. Jyothi, S. T. Lakshikumar and P.P. Krishnapur. 716
9. Gyrotropy ; V. K. Wadhawan. 717
10. Group Theoretical Analysis of Second Order Phase
Transitions in UI3 : M. K. Slkdar and P. Rudra. 720
11. Is the Universal Behaviour of Transport Coeffi¬
cient Anomaly Breaking Down in Critical Binary
Liquid Systems ? r Anil Kumar, Chandrasekhara
Shetty and E. S. R. Gopal. 723
12. Fluctuation Approach to Ultrasonic Anomaly In
VgSi : 5. Dattagupta and G. Venkataraman, 727
13. Phase Tradition and Structure Dependence of the
Potential Parameters for Group IV Elements :
A. Ghosh and A.N. Basu. 730
14. High Temperature Expansion of ThermodynamicQuantities : Y. S. T. Rao. 734
-XXV-
Page
15, Shape of the Critical Nucleus during First
Order Phase Transition ' S. Vaaudevan.
S. Nagalingam, P. Ramaswamy and G. S. Laddha. 737
VIL RADIATION AND DAMAGE STUDIES
1. Theoretical Investigation of Deviations from Statistical
Equilibrium in Planar Channelling : S. G. Gaonkar
and A. G. Wagh. 740
2. Planar Oscillations in the Energy Spectra of He
Ions Backscattered from Impurity Atoms
A. G. Wagh, J. S. Williams and E. Uggerhj. 744
3. Channeling in Thin Lead Sulphide Films :
A. G. Wagh. 746
4. Blistering and Exfoiiatinn of Zirconium, Inconel-718,
Stainless Steel-316 and Aluminium by 2 MeV He
Beam ; D. K. Sood, M. Sundararaman, S.K. Deb,
R. Krishnan and M.K. Mehta. 747
5. A New Model for Blister Exfoliation : S. K. Deb
and D.K. Sood, 748
6. Interfacial Segregation in Au-Ni Alloys : Vijay Kumar 749
7. Design, Fabrication and Performance of a 200 KeV
Ion Implantation System : S. B. Ogale, M. R. Bhiday,
A.S. Ogale and V.N. Bhoraskar. 752
*8. Some Characteristics of a Versatile Indigenous Ion
Source : G. S. Virdi, M. D. Aggarwal, V. K, Mathur,
S.K. Chattopadhyaya and Narendra Nath. 7 56
9. Proton Diffusion in Metals : S. Prakash. 757
10. Thermal Migration of Iron Implanted in Aluminium
at High Doses: V. K. Asundi, M. C. Joshi, S.K. Deb,
V. N. Kulkarni, D. K. Sood and M. Sundararaman. 761
U. Computer Simulation of Sputtering of Argon Ions from
Various Targets : R. Shanta.765
12. Small Vacancy Clusters in Mg : Lattice Static
Results by Computer Simulation : K. Krishan.
S. Srinivasan and H.K. Sahu. 768
-XXVI
Paffe
Statistical Description of Dislocation Dynamics -
Application to Creep in LiF : D. Sahoo and
G. Ananthakrishna. (Presented by V. Balakrishnan) 771
A Dislocation Model of Work Hardening - Appli¬
cation to Creep in LiF : G. Ananthakrishnan and
D. Sahoo. (Presented by V. Balakrishnan) 775
Reactive-Diffusive Model for Vacancy Contribution
to Resistivity : V. Balakrishnan and N. K. Bansal. 779
Models for Defect Production By Irradiation :
Exact Solutions and Implication of Stability, Pulsed
Irradiation and Fluctuations : K. Krishan. 7 82
Radiation Damage in Some EN Steels : Manik
Nandanpawar and S. Rajagopalan. 785
Dislocation in Crystalline Solid Studied byMossbauer Effect ; D, Bhattacharya and S, Mitra. 787
INSTRUMENTATION FOR SOLID STATE STUDIES
Thin Film Thickness Monitor Using a Dobly OsciLlat-
ing Quartz Crystal : D.K. Kaushik, S. K. Chattopadhyayaand N. Nath. 788
An Automated Rotary Crystallizer : R. Krishna-
swamy. 791
Thermoluminescence Unit for Radioactive Samplesin the Temperature Range 100-750°K : A. G. I.
Dalvi, M. D. Sastry and B. D. Joshi. 794
New Preparation Method which might Replace Hot
Pressed Garnets : N. G. Nanadikar and V. R. Palkar. 797
A Simple TecUiique for the Growth of Fluorite
Crystals and Their Whiskers : C. C Desai and
V. John. 800
Switching Characteristics of Ferroelectrics :
Ramanath Ravi, K. S. Sangunni and P. S. Narayanan. 801
-xxvxx-
Page
*7. Design of AC Cycle Controller for Measurement
of the Surge Forward Voltage Drop and TemperatureRise of Silicon Diodes : S. B. Bhosaie and
K. Ramani. 802
*8. Design and Fabrication of a Single Crystal GrowingUnit and Growth of a Zinc Single Crystal :
A. Ramchandra Reddy, B. D. Singh and
V. Venkateswar Rao. 803
9. Some Simple Industrial Applications of Mossbauer
E«ect : N. K. Jaggi and K. R. P. M. Rao. 804
*10. A Constant Velocity Mossbauer Spectrometer Free of
Long-Term Instrumental Drifts in the Count Rate :
P. R, Sarma, A. K. Sharma and K. C. Tripathi. 807
11. An Exact Solution Technique for Determining the
Dielectric and Magnetic Susceptibility of Low Loss
Microwave Materials : N. S. Hanumantharao and
M. J. Patni. 808
12. A NQR Spectrometer with AGC and Sideband
Suppression : K. Rukmani, J. Ramakrishna and
S. L. V. Chary. 811
13. A Single Klystron Superhet ESR Spectrometer for
Low Level and Low Frequency Modulation :
C. V. Manjunath, N. C Mishra, S, Sinha,
R. Srinivasan and P. Venkatarathnam. 814
14. Ratio Transformer Impedance Bridge for the
Measurement of Very Small Capacitances :
B. R. Madhu, Ramnath Ravi, H. L. Bhat and
P. S. Narayanan. 817
*15. An Inexpensive Solid State Receiver for Pulsed NMR
Spectrometer : P. Narasimha Reddy and
B, P. Nagi Reddy. 820
16. Characteristics of 5T-Superconductivity Solenoid
with Detachable Current Leads : V. Chopra,
G. Dharmadurai and N. S. Satya Murthy. 821
17. Design and Fabrication of a High Homogeneity
High Field Superconducting Magnet, a Metal Cryostat
and a High Stability Energiser at NPL : V. G. Bhide,
S. N. Ekbote, A. K.Gupta, A, V. Narlikar, R. G. Sharma,
V. S. Yadav, G. S. Swaminathan and G. S. Vaidyanathan. 824