Radiative transition probabilities for forbidden lines in singly ionized cobalt (Co II)^*

Astrophysique et Spectroscopie, Université de Mons-Hainaut, B-7000 Mons, Belgium

Received: 30 July 1997
Accepted: 8 September 1997

Abstract

Radiative transition probabilities have been calculated for the magnetic dipole (M1) and electric quadrupole (E2) transitions connecting the 47 metastable energy levels in the 3d⁸, 3d⁷4s and 3d⁶4s² configurations in Co II. The most important configuration interaction (CI) and relativistic effects have been taken into account in the computations carried out with the help of the relativistic Hartree-Fock (HFR) method combined with a semi-empirical optimization of the radial parameters.