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On the 1s2s2p 4Po5/2 metastable
state in the Li-like ions
P. Palmeri, P. Quinet, C. Mendoza, M. Godefroid, N. Vaeck and P.
Indelicato
Université de Mons-Hainaut
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Introduction
Decay properties of 1s2s2p 4Po5/2 is a
workbench for magnetic interactions
Good case for comparing the Breit-Pauli approximation with models based on the Dirac equation !
Codes used
• Breit-Pauli approximation: SUPERSTRUCTURE (M1 & M2) AUTOSTRUCTURE (Auger & M1)
• Dirac equation:
GRASP (M1 & M2)
MDF-GME (M1, M2 & Auger)
SUPER/AUTOSTRUCTURE
• Schrodinger equation using a scaled TFD potential, V(r).
• Magnetic interactions (1 & 2-body): spin-orbit, spin-other-orbit, spin-spin, spin-contact, orbit-orbit.
• CI: single and double-excitations up to n=3• Orthogonal orbitals• DW approximation for the Auger• Z=3,4,6,7,8,9,10,12,13,14,16,18,20,22,23,25,26,30,36,54,67,80,92
GRASP
• Multiconfiguration Dirac-Fock method
• Breit interaction + QED corrections
• CI: S&D-excitations up to n=3
• Orthogonal orbitals
• Z=4,6,7,8,9,10,12,13,14,16,18,20,22,23,25,26,30,36,54,67,80,92
MDF-GME
• MCDF method
• Breit interaction + QED corrections
• CI: S&D-excitations up to n=4 (M1&M2);
up to n=5 (Auger)
• Non-orthogonal orbitals
• DW approximation
• Z=16,18,26
Relativistic correction to the M1 transition operator
Ion SS*
A (s-1)
SS
A (s-1)
GRASP
A (s-1)
MDF
A (s-1)
S XIV 6.37E-1 1.33E+6 1.34E+6 2.10E+6
Ar XVI 1.52 4.46E+6 4.54E+6 6.26E+6
Fe XXIV 6.22E+2 1.94E+8 2.00E+8 2.22E+8