Comprehensive calculations of energy levels, radiative transition parameters, hyperfine structure constants A$_J$-B$_J$, Landé g$_J$ factors and isotope shifts for Sc XX

Abstract

Large scale calculations for the energy levels, transition rates, oscillator strengths, lifetimes, hyperfine interaction constants, Landé g J factors, and isotope shift factors have been performed for 1s 2 and 1snl (n = 2 − 8 and l ≤ n − 1) levels of He-like Sc XX ion. The GRASP2018 package based on multiconfigurational Dirac-Fock method is used to obtain these results. The leading quantum electrodynamic corrections, Breit interaction and nuclear recoil effects are also included in the succeeding relativistic configuration interaction calculations. The relativistic isotope shift (RIS4) program is used to determine the mass and field shifts factors. A detailed comparison of the present results with the corresponding values from the NIST database and other theoretical work, wherever available, has been done, and an excellent agreement is achieved. A large section of the results is reported for the first time in the present work.

Relativistic Calculation of Energies, Transition Parameters Hyperfine Structure, Landé g$_J$ and Isotope shifts factors for Ar$^{7+}$, Kr$^{25+}$ and Xe$^{43+}$ ions

“…We have given here only a brief description of the methods applied in the present calculations. Although theoretical details are widely available in the literature, they can also be followed from previous papers [62,65,66]. The MCDF method is based on the Dirac-Coulomb Hamiltonian, which for an N electron system is written as,…”