Eur. Phys. J. Plus (2017) 132: 312
https://doi.org/10.1140/epjp/i2017-11589-2

Regular Article

Atomic data of intermediate autoionzing Rydberg series nf[K]_J (n = 4, 5), nd[K]_J (n = 5, 6), np[K]_J (n = 6, 7) and ns[K]_J (n = 7, 8) of neutral argon atom in the multiconfiguration Dirac-Hartree-Fock framework

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

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

Received: 9 April 2017
Accepted: 8 June 2017
Published online: 19 July 2017

Abstract

We report the results of an accurate computation of the energy levels, oscillator strengths , the radiative transition rates , the Landé g-factor, the magnetic dipole and the electric quadrupole hyperfine constants of the intermediate Rydberg series , , and relative to the ground state 3p^{6 1}S₀ for neutral argon atom spectra based on the multiconfiguration Dirac-Hartree-Fock (MCDHF) approach. In this approach, the quantum electrodynamics (QED) effects with transverse photon Breit interaction and vacuum photon polarization self-energy corrections are included. Moreover, the perturbation due to the core-polarization and electron correlation effects are taken into account. We also reported the oscillator strengths and transition rates in Coulomb and Babushkin gauges for the 3p⁵(²P)3d-3p⁵(²P)4f, 3p⁵(²P)3d-3p⁵(²P)5f, 3p⁵(²P)4d-3p⁵(²P)4f, 3p⁵(²P)4d-3p⁵(²P)5f, 3p⁵(²P)5d-3p⁵(²P)4f, 3p⁵(²P)5d-3p⁵(²P)5f, 3p⁵(²P)6d-3p⁵(²P)4f and 3p⁵(²P)6d-3p⁵(²P)5f transition arrays as well as the 3p⁵(²P)5d-3p⁵(²P)6p, 3p⁵(²P)7s-3p⁵(²P)6p, 3p⁵(²P)7s-3p⁵(²P)7p and 3p⁵(²P)8s-3p⁵(²P)7p transition arrays. Insofar as experimental or theoretical values by other authors exist, comparison is made with those values; it turns out that, for most of the levels, a rather satisfying agreement with these experimental and theoretical results is obtained, thus confirming the reliability of our data.