Relativistic many-body calculations of electric-dipole transitions betweenstates in B-like ions
- 1 August 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 60 (2), 996-1004
- https://doi.org/10.1103/physreva.60.996
Abstract
Transition rates, oscillator strengths, and line strengths are calculated for the 49 possible electric-dipole transitions between the eight even-parity states and the seven odd-parity and states in boronlike ions with nuclear charges ranging from to 100. Relativistic many-body perturbation theory (MBPT), including the Breit interaction, is used to evaluate retarded matrix elements in length and velocity forms. The calculations start from a Dirac-Fock potential. First-order MBPT is used to obtain intermediate coupling coefficients and second-order MBPT is used to calculate transition matrix elements. Contributions from negative-energy states are included in the second-order matrix elements to ensure gauge independence of transition amplitudes. The transition energies used in the calculation of oscillator strengths and transition rates are from second-order MBPT. Transition rates, line strengths, and oscillator strengths are compared with critically evaluated experimental values and with results from other recent calculations. Lifetimes of the five possible odd-parity upper levels and the five possible even-parity upper levels are given for . Trends of the transition rates as functions of Z are illustrated graphically for selected transitions.
Keywords
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