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Breit and QED effects on the 3d9 D3/2 2 →2D5/2 transition energy in Co-like ions

Si, R.; Guo, X. L.; Brage, T. LU ; Chen, C. Y.; Hutton, R. and Fischer, C. Froese (2018) In Physical Review A 98(1).
Abstract

The multiconfiguration Dirac-Hartree-Fock theory is used to calculate the 3d9D3/22→2D5/2 transition energy for Co-like ions with Z=28-100. We investigate how electron correlation, frequency-independent and -dependent Breit interactions, as well as QED corrections vary along the sequence. The well-understood frequency-independent Breit contribution has the largest contribution for all ions. Among the corrections to this, correlation decreases rapidly with Z, the frequency-dependent Breit contribution is important especially for high-Z ions, and the self-energy contribution to the QED becomes the largest correction already for Z>50. We evaluate and compare results for the Self-energy in three different approximations, (i) the approach... (More)

The multiconfiguration Dirac-Hartree-Fock theory is used to calculate the 3d9D3/22→2D5/2 transition energy for Co-like ions with Z=28-100. We investigate how electron correlation, frequency-independent and -dependent Breit interactions, as well as QED corrections vary along the sequence. The well-understood frequency-independent Breit contribution has the largest contribution for all ions. Among the corrections to this, correlation decreases rapidly with Z, the frequency-dependent Breit contribution is important especially for high-Z ions, and the self-energy contribution to the QED becomes the largest correction already for Z>50. We evaluate and compare results for the Self-energy in three different approximations, (i) the approach implemented in the grasp2k package, (ii) the method based on Welton's concept and (iii) a model operator approach recently developed by Shabaev and coworkers. Through comparison with experimental values, it seems that the third set of results have the best agreement with experiments, but the difference from experiments for high-Z ions, is around 0.03%-0.04%, and therefore our results are outside the error bars of the experiments.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
98
issue
1
publisher
American Physical Society
external identifiers
  • scopus:85050083067
ISSN
2469-9926
DOI
10.1103/PhysRevA.98.012504
language
English
LU publication?
yes
id
0e5afecf-db44-49a1-bb43-04aec805eb92
date added to LUP
2018-08-02 08:13:41
date last changed
2019-09-17 04:36:29
@article{0e5afecf-db44-49a1-bb43-04aec805eb92,
  abstract     = {<p>The multiconfiguration Dirac-Hartree-Fock theory is used to calculate the 3d9D3/22→2D5/2 transition energy for Co-like ions with Z=28-100. We investigate how electron correlation, frequency-independent and -dependent Breit interactions, as well as QED corrections vary along the sequence. The well-understood frequency-independent Breit contribution has the largest contribution for all ions. Among the corrections to this, correlation decreases rapidly with Z, the frequency-dependent Breit contribution is important especially for high-Z ions, and the self-energy contribution to the QED becomes the largest correction already for Z&gt;50. We evaluate and compare results for the Self-energy in three different approximations, (i) the approach implemented in the grasp2k package, (ii) the method based on Welton's concept and (iii) a model operator approach recently developed by Shabaev and coworkers. Through comparison with experimental values, it seems that the third set of results have the best agreement with experiments, but the difference from experiments for high-Z ions, is around 0.03%-0.04%, and therefore our results are outside the error bars of the experiments.</p>},
  articleno    = {012504},
  author       = {Si, R. and Guo, X. L. and Brage, T. and Chen, C. Y. and Hutton, R. and Fischer, C. Froese},
  issn         = {2469-9926},
  language     = {eng},
  month        = {07},
  number       = {1},
  publisher    = {American Physical Society},
  series       = {Physical Review A},
  title        = {Breit and QED effects on the 3d9 D3/2 2 →2D5/2 transition energy in Co-like ions},
  url          = {http://dx.doi.org/10.1103/PhysRevA.98.012504},
  volume       = {98},
  year         = {2018},
}