MCDHF and RCI calculations of energy levels, lifetimes andtransition rates for 3l3l0, 3l4l0 and 3s5l states in Ca IX - As XXII andKr XXV

Published

January 4, 2017

Author(s)

S. Gustafsson, P. Jonsson, Charlotte F. Fischer, Ian P. Grant

Abstract

Multiconfiguration Dirac-Hartree-Fock (MCDHF) calculations and relativistic configuration interaction (RCI) calculations are performed for states of the 3l3l0, 3l4l0 and 3s5l configurations in the Mg-like ions Ca IX - As XXII and Kr XXV. Valence and core-valence electron correlation e ects are accounted for through large configuration state function expansions. Calculated excitation energies are in very good agreement with observations for the lowest levels. For higher lying levels observations are often missing and present energies aid line identification in spectra. Lifetimes and transition data are given for all ions. There is an excellent agreement for both lifetimes and transition data with recent multiconfiguration Hartree-Fock Breit Pauli calculations.

Citation

Astronomy & Astrophysics

Volume

597

Pub Type

Journals

Download Paper

https://doi.org/10.1051/0004-6361/201628768

Local Download

Keywords

excitation energies, transition rates, lifetimes, Mg-like atoms, iron, density diagnostics

Citation

Gustafsson, S. , Jonsson, P. , Fischer, C. and Grant, I. (2017), MCDHF and RCI calculations of energy levels, lifetimes andtransition rates for 3l3l0, 3l4l0 and 3s5l states in Ca IX - As XXII andKr XXV, Astronomy & Astrophysics, [online], https://doi.org/10.1051/0004-6361/201628768, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=920467 (Accessed October 17, 2025)