Kαtransition probabilities for fluorinelike ions from neon to gold:Ab initiorelativistic coupled-cluster calculations

Chiranjib Sur, Sultana N. Nahar, Anil K. Pradhan
2008 Physical Review A. Atomic, Molecular, and Optical Physics  
We have applied the relativistic Fock-space coupled-cluster theory to calculate K␣ 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 K␣ 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
more » ... ariant of coupled-cluster theories to study the K␣ transitions should be the most accurate determination of these transition probabilities to date. The most important finding in this paper is the crossover of K␣ 1 and K␣ 2 at high Z. In general, for lighter ions, K␣ 2 is higher in magnitude than K␣ 1 , but at Z = 41-42 they are switched. In addition, the results demonstrate the variation with Z of the K␣ 2 A values along the Periodic Table. The astrophysical significance in the analysis of K␣ lines, important in x-ray astronomy, is pointed out.
doi:10.1103/physreva.77.052502 fatcat:a6ig27matrab3lq64zzlgb3e4i