RIS4: A program for relativistic isotope shift calculations

Spectral lines from different isotopes display a small separation in energy, commonly referred to as the line isotope shift. The program RIS4 (Relativistic Isotope Shift) calculates normal and specific mass shift parameters as well as field shift electronic factors from relativistic multiconfigurati...

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Bibliographic Details
Published in:Computer physics communications 2019-02, Vol.235, p.433
Main Authors: Ekman, Jörgen, Jönsson, Per, Godefroid, M., Naze, C., Gaigalas, G., Bieron, J.
Format: Article
Language:English
Subjects:
Field shift
Isotope shift
Mass shift
Normal mass shift
Seltzer moment
Specific mass shift
Online Access:Get full text
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Summary:Spectral lines from different isotopes display a small separation in energy, commonly referred to as the line isotope shift. The program RIS4 (Relativistic Isotope Shift) calculates normal and specific mass shift parameters as well as field shift electronic factors from relativistic multiconfiguration Dirac-Hartree-Fock wave functions. These quantities, together with available nuclear data, determine isotope-dependent energy shifts. Using a reformulation of the field shift, it is possible to study, in a model-independent way, the atomic energy shifts arising from changes in nuclear charge distributions, e.g. deformations. (C) 2018 Published by Elsevier B.V.
ISSN:1879-2944
0010-4655
DOI:10.1016/j.cpc.2018.08.017