An efficient method for computing relativistic mixing in complex spectra: application to sextet-quartet mixing in Cr II
- 28 November 1990
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 23 (22) , L733-L738
- https://doi.org/10.1088/0953-4075/23/22/001
Abstract
Structure and oscillator strength calculations are performed for the Cr II ion in intermediate coupling. Certain important correlation configurations contribute large numbers of levels which makes the problem very demanding in computing resources. A method of selecting a 'natural' basis for the algebraic expansion states is demonstrated. This method results in very substantial reduction in the size of the problem and allows one to investigate large relativistic mixing problems that might otherwise be intractible. The method is applied to the level structure arising from mixing the 4p 6Do, 6Po and 4Po terms in Cr II. Results are reported for oscillator strengths for transition from these levels to the levels arising from 3d5 6S and 4s 6D terms.Keywords
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