Eur. Phys. J. D (2021) 75: 35
https://doi.org/10.1140/epjd/s10053-020-00031-1

Regular Article - Topical Issue

The fully relativistic multi-configuration Dirac–Hartree–Fock method for atomic structure calculations for multiply charged ions: the example of Ca XV

¹ Department of Physics and Astronomy, College of Sciences, King Saud University, Riyadh, Saudi Arabia
² Department of Physics, College of Sciences, King Khalid University, Abha, Saudi Arabia
³ GRePAA, INSAT, Centre Urbain Nord, University of Carthage, Tunis, Tunisia
⁴ Astronomical Observatory, Volgina 7, 11060, Belgrade 38, Serbia
⁵ Observatoire de Paris, Université PSL, CNRS, LERMA, Sorbonne Université, F-92190, Meudon, France

^d mdimitrijevic@aob.rs

Received: 31 October 2020
Accepted: 30 November 2020
Published online: 25 January 2021

Abstract

In this work, fully relativistic multi-configuration Dirac–Hartree–Fock approach for calculating atomic structure parameters has been presented and compared to other approaches such as Hartree–Fock pseudo-Relativistic (HFR) method. As an example of application, results of fully relativistic calculations for the ion Ca XV have been obtained and compared to Hartree–Fock pseudo-relativistic calculations and to NIST database values.This example is important for plasma diagnostic and astrophysical studies because Ca XV atomic data of high accuracy are still very scarce.