Ab-Initio Calculations of Level Energies, Oscillator Strengths and Radiative Rates for E1 Transitions in Beryllium-Like Iron

Atoms

Ahmed Abou El-Maaref¹  Stefan Schippers²  Alfred Müller² 

[1] Physics Department, Faculty of Science, Al-Azhar University Assiut, 71524 Assiut, Egypt;Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany; E-Mails:

关键词: energy levels;    oscillator strengths;    radiative rates;    be-like iron;   

DOI  :  10.3390/atoms3010002

来源: mdpi

【 摘 要 】

In the present work, energy levels, oscillator strengths, radiative rates and wavelengths of Be-like iron (Fe²²⁺) from ab-initio calculations using the multiconfiguration Dirac-Hartree-Fock method are presented. These quantities have been calculated for a set of configurations in the general form 1s² nl n′l′, where n = 2, 3 and n′ = 2, 3, 4, 5 and l = s, p, d and l′ = s, p, d, f, g. In addition, excitations of up to four electrons, including core-electron excitations, have been considered to improve the quality of the wave functions. This study comprises an extensive set of E1 transition rates between states with different J. The present results are compared with the available experimental and theoretical data.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland