Phys. Rev. A 70, 042502 (2004) [9 pages]Relativistic configuration-interaction perturbation-theory method with application to intercombination and allowed transitions of light Be-like ionsReceived 22 March 2004; published 12 October 2004 We have improved our previous mixed configuration-interaction and perturbation-theory (CI+MBPT) methods by including all second-order Coulomb and lowest-order Breit terms. The method is applied in calculations of E1 matrix elements for the two 2s2→2s2p transitions of light Be-like ions. The results are in good agreement with experiments and other precise calculations. The length and velocity transition amplitudes are also more consistent. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.70.042502
DOI:
10.1103/PhysRevA.70.042502
PACS:
31.30.Jv, 31.10.+z, 32.70.Cs, 32.80.−t
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