Eur. Phys. J. D 40, 91-99 (2006)
https://doi.org/10.1140/epjd/e2006-00139-6

Radiative lifetime and oscillator strength determinations in potassium ions (K V, K VI and K VII)

¹ Institut de Physique Nucléaire, Atomique et de Spectroscopie, Université de Liège, Sart Tilman (Bât. B15), B-4000 Liège, Belgium
² Astrophysique et Spectroscopie, Université de Mons-Hainaut, B-7000 Mons, Belgium
³ UMR 8102 (associée au CNRS et à l'Université Paris-7) et LUTh, Observatoire de Paris, F-92195 Meudon, France

Corresponding author: ^a E.Biemont@ulg.ac.be

Received: 17 February 2006
Revised: 12 April 2006
Published online: 15 June 2006

Abstract

Oscillator strengths have been calculated for the transitions depopulating levels of the 3s²3p³, 3s3p⁴ configurations of K V, of the 3s²3p², 3s3p³ configurations of K VI and of the 3s²3p, 3s3p², 3p³ and 3s3p3d configurations of K VII. A multiconfiguration Dirac-Fock method, incorporating the relativistic two-body Breit interaction and quantum electrodynamics corrections due to self-energy and vacuum polarization, has been used for the calculations. The reliability of this approach has been tested by comparison with relativistic Hartree-Fock calculations and also with some experimental measurements performed by beam-foil spectroscopy at a beam energy of 1.7 MeV.