Atomic data from the IRON Project. XIX. Radiative transition probabilities for forbidden lines in Fe II

¹ Laboratoire SIMPA (EP 99 du CNRS), Université de Rennes 1, Campus de Beaulieu, F-35042 Rennes, France
² URA 173 (associée au CNRS et à l'Université Paris 7) et DAEC, Observatoire de Paris, F-92195 Meudon, France

Send offprint request to: P. Quinet

Received: 19 April 1996
Accepted: 19 April 1996

Abstract

Radiative transition probabilities have been calculated for the magnetic dipole (M1) and electric quadrupole (E2) transitions connecting the 63 metastable levels in the 3d⁶4s, 3d⁷ and 3d⁵4s² configurations in Fe II. The most important configuration interaction (CI) and relativistic effects have been taken into account in the computations carried out with the help of two independent computer programs, SUPERSTRUCTURE (SST) and RELATIVISTIC HARTREE-FOCK (HFR). The results obtained in the present work are compared with previous theoretical studies and with some astrophysical observations. The new data presented here are probably the most reliable to date.