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Kα transition probabilities for fluorinelike ions from neon to gold: Ab initio relativistic coupled-cluster calculations

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Title: Kα transition probabilities for fluorinelike ions from neon to gold: Ab initio relativistic coupled-cluster calculations
Creators: Sur, Chiranjib; Nahar, Sultana Nurun; Pradhan, Anil K.
Issue Date: 2008-05-15
Publisher: American Physical Society
Citation: Chiranjib Sur, Sultana N. Nahar, Anil K. Pradhan, " Kα transition probabilities for fluorinelike ions from neon to gold: Ab initio relativistic coupled-cluster calculations," Physical Review A 77, no. 5 (2008), doi:10.1103/PhysRevA.77.052502
DOI: 10.1103/PhysRevA.77.052502
Abstract: We have applied the relativistic Fock-space coupled-cluster theory to calculate Kα transition properties of F-like ions for a number of elements throughout the periodic table. A state-specific form of the coupled-cluster method for electron detachment has been used to calculate the Kα energies and line strengths. The computed energies are used to determine the transition probabilities for more than 30 elements to study the Z dependencies for Z=10–79. This application of a variant of coupled-cluster theories to study the Kα transitions should be the most accurate determination of these transition probabilities to date. The most important finding in this paper is the crossover of Kα_1 and Kα_2 at high Z. In general, for lighter ions, Kα_2 is higher in magnitude than Kα_1, but at Z=41–42 they are switched. In addition, the results demonstrate the variation with Z of the Kα_2 A values along the Periodic Table. The astrophysical significance in the analysis of Kα lines, important in x-ray astronomy, is pointed out.
ISSN: 1094-1622
URI: http://hdl.handle.net/1811/48049
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