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

É. Biémont (1) , H.-P. Garnir (1) , P.-H. Lefèbvre (1) , P. Palmeri (2) , L. Philippart (2) , P. Quinet (1) , D. Rostohar (1) , Claude J. Zeippen (3)

1 IPNAS - Institut de Physique Nucléaire, Atomique et de Spectroscopie, Université de Liège
2 Astrophysique et Spectroscopie, Université de Mons-Hainaut
3 LUTH (UMR_8102) - Laboratoire Univers et Théories

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.

Domaines: Astrophysique [astro-ph]

É. Biémont, H.-P. Garnir, P.-H. Lefèbvre, P. Palmeri, L. Philippart, et al.. Radiative lifetime and oscillator strength determinations in potassium ions (K V, K VI and K VII). The European Physical Journal D : Atomic, molecular, optical and plasma physics, 2006, 40, pp.91-99. ⟨10.1140/epjd/e2006-00139-6⟩. ⟨hal-03732885⟩