Eur. Phys. J. Plus (2017) 132: 160
https://doi.org/10.1140/epjp/i2017-11436-6

Regular Article

Multiconfiguration Dirac-Hartree-Fock energy levels, oscillator strengths, transition probabilities, hyperfine constants and Landé g-factor of intermediate Rydberg series in neutral argon atom

¹ Department of Physics, The Hashemite University, 13115, Zarqa, Jordan
² Department of Physics, University of Jordan, 11942, Amman, Jordan

^* e-mail: wsalah@hu.edu.jo

Received: 10 February 2017
Accepted: 6 March 2017
Published online: 11 April 2017

Abstract

We computed the energy levels, oscillator strengths , the radiative transition rates , the Landé g -factor, the magnetic dipole moment and the electric quadrupole hyperfine constants of the intermediate Rydberg series (), (), () relative to the ground state 3p^{6 1}S₀ for neutral argon atom spectra. The values are obtained in the framework of the multiconfiguration Dirac-Hartree-Fock (MCDHF) approach. In this approach, Breit interaction, leading quantum electrodynamics (QED) effects and self-energy correction are taken into account. Moreover, these spectroscopic parameters have been calculated for many levels belonging to the configuration 3p⁵4s, 3p⁵5s, 3p⁵6s, 3p⁵3d, 3p⁵4d, 3p⁵4p, 3p⁵5p as well as for transitions between levels 3p⁵4s-3p⁵4p, 3p⁵4p-3p⁵3d, 3p⁵4p-3p⁵5s, 3p⁵5s-3p⁵5p and 3p⁵5p-3p⁵6s. The large majority of the lines from the 4p-5s and 4p-3d, 5s-5p and 5p-6s transition arrays have been observed and the calculations are consistent with the J -file-sum rule. The obtained theoretical values are compared with previous experimental and theoretical data available in the literature. An overall satisfactory agreement is noticed allowing assessing the reliability of our data.