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Theoretical radiative lifetimes of levels in singly ionized lanthanum

D Kułaga-Egger and J Migdałek

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Theoretical radiative lifetimes of 29 levels in singly ionized lanthanum are determined using Cowan's 'Hartree–Fock and relativistic corrections' (HFR) method modified by us to include core–valence electron correlations in the core-polarization picture. The configuration mixing coefficients have been determined semiempirically through a least-squares fitting procedure treating Slater and spin–orbit integrals as free parameters. The results obtained compared with available experimental and other theoretical data confirm the importance of valence–core correlation effects.


Footnote
*  Affiliation of Mrs Kułaga-Egger at the time the study was performed.
PACS

32.70.Cs Oscillator strengths, lifetimes, transition moments

31.15.V- Electron correlation calculations for atoms, ions and molecules

31.15.bu Semi-empirical and empirical calculations (differential overlap, Hückel, PPP methods, etc.)

31.30.J- Relativistic and quantum electrodynamic (QED) effects in atoms, molecules, and ions

31.15.xr Self-consistent-field methods

Subjects

Atomic and molecular physics

Computational physics

Dates

Issue 18 (28 September 2009)

Received 7 April 2009, in final form 24 June 2009

Published 9 September 2009



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