MCDHF and RCI calculations of energies and radiative rates of Mn VI and Cr V

Abstract

Energies, wavelengths and transition rates in Mn VI and Cr V have been calculated using the multiconfiguration Dirac-Hartree–Fock (MCDHF) and relativistic configuration interaction (RCI) methods. The present calculations have been compared with the available data from the NIST ASD and other calculations to evaluate the accuracy of the present calculations. The calculated 25 lowest energy levels have good agreement with the data from the NIST ASD and should provide missing data, especially for levels of the $3p^{5}3d^3$ configuration in the NIST ASD. The calculated $E1$ transitions of the type $3p^{6}3d^2$ - $3p^{6}3d4p$ and $E2$ transitions of the types $3p^{6}3d^2$ - $3p^{6}3d4s$ and $3p^{6}3d^2$ - $3p^{6}3d^3$ are in excellent agreement with the NIST ASD. The consistence between present calculated $E2$ and $M1$ transitions within the $3d^2$ configuration are worse with the NIST ASD. The data obtained are expected to be useful for nebula and supernovae analyses.