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Relativistic and correlation effects on the lifetimes of 3s4p3p°j levels in mg-like sulphur and chlorine

par Godefroid, Michel ;Froese Fischer, Charlotte
Référence Physica scripta, 31, 4, page (237-245)
Publication Publié, 1985-04

Article révisé par les pairs

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Résumé :

Accurate multiconfiguration Hartree-Fock calculations were performed to investigate the J-dependence of the lifetimes of 3s4p3P°J (J = 2, 1, 0) in S V and Cl VI. The relativistic corrections have been included through the Breit-Pauli approximation. The variation with J, observed in S V but not in Cl VI [4], is explained by the selective opening of decay channels resulting from the triplet-singlet mixing and by the J-dependence found in the El spin-allowed transition decay rates where the coulomb and relativistic configuration interaction between 3s4p and 3p3d play a crucial role. The effects of the relativistic shift corrections on the wavefunction compositions and transition probabilities are discussed. New gf-values are reported for the singlet-singlet electric dipole transistions from 3s4p1P°1, taking into account the1P-character loss due to the inter-symmetry mixing. © 1985 IOP Publishing Ltd.