Proposal of highly accurate tests of Breit and QED effects in the ground state 2p5 of the Flike isoelectronic sequence
(2018) In Physical Review A 98(2). Abstract
We propose that the ground term transition, 2p5P3/22P1/22, for ions in the Flike isoelectronic sequence could be used to accurately test current methods to compute Breit and quantumelectrodynamic (QED) effects. These systems are of interest since correlation is small due to what we will label Layzer quenching. Using the multiconfiguration DiracHarteeFock 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 selfenergy dominates for the midZ range (4080), but then decreases to change sign for Z≈90. For a few elements... (More)
We propose that the ground term transition, 2p5P3/22P1/22, for ions in the Flike isoelectronic sequence could be used to accurately test current methods to compute Breit and quantumelectrodynamic (QED) effects. These systems are of interest since correlation is small due to what we will label Layzer quenching. Using the multiconfiguration DiracHarteeFock 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 selfenergy dominates for the midZ range (4080), 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 frequencydependent transverse photon correction. The uncertainties of the treatment of the wellunderstood frequencyindependent Breit correction and correlation are expected to be at least three orders of magnitude smaller than the QED and frequencydependent transverse photon corrections for high Z. In this work we also compare and evaluate the results from three different methods to compute selfenergies.
(Less)
 author
 Li, M. C. ; Si, R. ; Brage, T. ^{LU} ; Hutton, R. ^{LU} and Zou, Y. M.
 organization
 publishing date
 20180807
 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
 24699926
 DOI
 10.1103/PhysRevA.98.020502
 language
 English
 LU publication?
 yes
 id
 07f514d6ef0a4889ae409b733865f989
 date added to LUP
 20180910 13:11:29
 date last changed
 20191120 05:25:06
@article{07f514d6ef0a4889ae409b733865f989, abstract = {<p>We propose that the ground term transition, 2p5P3/22P1/22, for ions in the Flike isoelectronic sequence could be used to accurately test current methods to compute Breit and quantumelectrodynamic (QED) effects. These systems are of interest since correlation is small due to what we will label Layzer quenching. Using the multiconfiguration DiracHarteeFock 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 selfenergy dominates for the midZ range (4080), 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 frequencydependent transverse photon correction. The uncertainties of the treatment of the wellunderstood frequencyindependent Breit correction and correlation are expected to be at least three orders of magnitude smaller than the QED and frequencydependent transverse photon corrections for high Z. In this work we also compare and evaluate the results from three different methods to compute selfenergies.</p>}, author = {Li, M. C. and Si, R. and Brage, T. and Hutton, R. and Zou, Y. M.}, issn = {24699926}, 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 Flike isoelectronic sequence}, url = {http://dx.doi.org/10.1103/PhysRevA.98.020502}, doi = {10.1103/PhysRevA.98.020502}, volume = {98}, year = {2018}, }