Proposal of highly accurate tests of Breit and QED effects in the ground state 2p5 of the F-like isoelectronic sequence
(2018) In Physical Review A 98(2).- Abstract
We propose that the ground term transition, 2p5P3/22-P1/22, for ions in the F-like isoelectronic sequence could be used to accurately test current methods to compute Breit and quantum-electrodynamic (QED) effects. These systems are of interest since correlation is small due to what we will label Layzer quenching. Using the multiconfiguration Dirac-Hartee-Fock method, we investigate how correlation, Breit and QED corrections vary along the sequence and show that QED dominates over correlation already for Z≈20. We also investigate the behavior of different QED effects as a function of the nuclear charge and find that the self-energy dominates for the mid-Z range (40-80), but then decreases to change sign for Z≈90. For a few elements... (More)
We propose that the ground term transition, 2p5P3/22-P1/22, for ions in the F-like isoelectronic sequence could be used to accurately test current methods to compute Breit and quantum-electrodynamic (QED) effects. These systems are of interest since correlation is small due to what we will label Layzer quenching. Using the multiconfiguration Dirac-Hartee-Fock method, we investigate how correlation, Breit and QED corrections vary along the sequence and show that QED dominates over correlation already for Z≈20. We also investigate the behavior of different QED effects as a function of the nuclear charge and find that the self-energy dominates for the mid-Z range (40-80), but then decreases to change sign for Z≈90. For a few elements between Z=85 and 90 the vacuum polarization is the leading term, while for higher Z the two QED contributions cancel. This opens up the possibility for these ions to carefully test the frequency-dependent transverse photon correction. The uncertainties of the treatment of the well-understood frequency-independent Breit correction and correlation are expected to be at least three orders of magnitude smaller than the QED and frequency-dependent transverse photon corrections for high Z. In this work we also compare and evaluate the results from three different methods to compute self-energies.
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- author
- Li, M. C. ; Si, R. ; Brage, T. LU ; Hutton, R. LU and Zou, Y. M.
- organization
- publishing date
- 2018-08-07
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review A
- volume
- 98
- issue
- 2
- article number
- 020502
- publisher
- American Physical Society
- external identifiers
-
- scopus:85051166502
- ISSN
- 2469-9926
- DOI
- 10.1103/PhysRevA.98.020502
- language
- English
- LU publication?
- yes
- id
- 07f514d6-ef0a-4889-ae40-9b733865f989
- date added to LUP
- 2018-09-10 13:11:29
- date last changed
- 2022-04-25 17:05:56
@article{07f514d6-ef0a-4889-ae40-9b733865f989, abstract = {{<p>We propose that the ground term transition, 2p5P3/22-P1/22, for ions in the F-like isoelectronic sequence could be used to accurately test current methods to compute Breit and quantum-electrodynamic (QED) effects. These systems are of interest since correlation is small due to what we will label Layzer quenching. Using the multiconfiguration Dirac-Hartee-Fock method, we investigate how correlation, Breit and QED corrections vary along the sequence and show that QED dominates over correlation already for Z≈20. We also investigate the behavior of different QED effects as a function of the nuclear charge and find that the self-energy dominates for the mid-Z range (40-80), but then decreases to change sign for Z≈90. For a few elements between Z=85 and 90 the vacuum polarization is the leading term, while for higher Z the two QED contributions cancel. This opens up the possibility for these ions to carefully test the frequency-dependent transverse photon correction. The uncertainties of the treatment of the well-understood frequency-independent Breit correction and correlation are expected to be at least three orders of magnitude smaller than the QED and frequency-dependent transverse photon corrections for high Z. In this work we also compare and evaluate the results from three different methods to compute self-energies.</p>}}, author = {{Li, M. C. and Si, R. and Brage, T. and Hutton, R. and Zou, Y. M.}}, issn = {{2469-9926}}, language = {{eng}}, month = {{08}}, number = {{2}}, publisher = {{American Physical Society}}, series = {{Physical Review A}}, title = {{Proposal of highly accurate tests of Breit and QED effects in the ground state 2p5 of the F-like isoelectronic sequence}}, url = {{http://dx.doi.org/10.1103/PhysRevA.98.020502}}, doi = {{10.1103/PhysRevA.98.020502}}, volume = {{98}}, year = {{2018}}, }