Analysis of discrepancy in previously published excitation energies of Ne-like ions from two independent codes and atomic data of Rb XXVIII and Ba XLVII

Abstract

Fine structure energies and radiative data namely, transition wavelength, transitions rates, oscillator strength and line strength have been presented for lowest 75 levels of highly ionized Ne-like Rb27+ (Rb XXVIII) and Ne-like Ba46+ (Ba XLVII) by using Multi-Configuration Dirac-Fock (MCDF) method. Our presented transition X-ray wavelengths of Ne-like Rb match well with Ne-like Rb experimentally determined laser wavelengths from different laser techniques. We have analyzed inconsistencies and uncertainties in previous Ne-like ions results by the evaluation of results from two independent codes general purpose relativistic atomic structure package (GRASP) and flexible atomic code (FAC). Our excitation energies for Rb XXVIII and Ba XLVII match well with NIST and other available results. We demonstrate that inclusion of configuration interaction (CI) is crucial to attain the accuracy in atomic data calculations. The present results are complete, extensive and in good agreement with other results and believe that presented results will be effective and helpful in detection of other X-ray spectral lines of Ne-like Rb laser from different sources.