The structure and radiative lifetimes of negative ions homologous to N-
(2019) In Journal of Physics B: Atomic, Molecular and Optical Physics 52(12). p.1-11- Abstract
Negative ions homologous to N- are interesting systems, since there are several bound terms within the ground configuration. The forbidden transitions between them, often dominated by the magnetic dipole contributions, are affected by term mixing - a relativistic effect. When increasing the nuclear charge in the homologous sequence of negative ions, this effect increases. In this paper we use systematic multiconfiguration Dirac-Hartree-Fock calculations to study these effects and predict affinities, level splittings and transition rates between bound states of N-, P-, As-, Sb- and Bi-. By monitoring the line strengths we are able to predict the deviation from the... (More)
Negative ions homologous to N- are interesting systems, since there are several bound terms within the ground configuration. The forbidden transitions between them, often dominated by the magnetic dipole contributions, are affected by term mixing - a relativistic effect. When increasing the nuclear charge in the homologous sequence of negative ions, this effect increases. In this paper we use systematic multiconfiguration Dirac-Hartree-Fock calculations to study these effects and predict affinities, level splittings and transition rates between bound states of N-, P-, As-, Sb- and Bi-. By monitoring the line strengths we are able to predict the deviation from the non-relativistic LS-coupled values for transitions between levels of the lowest 3P term. For Sb- the 1D term is also bound, and the prediction for the rates of its transition to the 3P-levels is a challenge for theory. For Bi- less is known experimentally and we analyze its structure and the relativistic contributions to it.
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- author
- Su, Yangluojia ; Si, Ran LU ; Yao, Ke and Brage, Tomas LU
- organization
- publishing date
- 2019-05-28
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- atomic structure, bound states, electron affinity, forbidden transitions, lifetimes, negative ions
- in
- Journal of Physics B: Atomic, Molecular and Optical Physics
- volume
- 52
- issue
- 12
- article number
- 125002
- pages
- 11 pages
- publisher
- IOP Publishing
- external identifiers
-
- scopus:85068607582
- ISSN
- 0953-4075
- DOI
- 10.1088/1361-6455/ab19e3
- language
- English
- LU publication?
- yes
- id
- d722c0de-47d3-44ad-b1ba-8af4556d447b
- date added to LUP
- 2019-07-17 15:44:40
- date last changed
- 2020-01-13 02:14:14
@article{d722c0de-47d3-44ad-b1ba-8af4556d447b,
abstract = {<p>Negative ions homologous to N<sup>-</sup> are interesting systems, since there are several bound terms within the ground configuration. The forbidden transitions between them, often dominated by the magnetic dipole contributions, are affected by term mixing - a relativistic effect. When increasing the nuclear charge in the homologous sequence of negative ions, this effect increases. In this paper we use systematic multiconfiguration Dirac-Hartree-Fock calculations to study these effects and predict affinities, level splittings and transition rates between bound states of N<sup>-</sup>, P<sup>-</sup>, As<sup>-</sup>, Sb<sup>-</sup> and Bi<sup>-</sup>. By monitoring the line strengths we are able to predict the deviation from the non-relativistic LS-coupled values for transitions between levels of the lowest <sup>3</sup>P term. For Sb<sup>-</sup> the <sup>1</sup>D term is also bound, and the prediction for the rates of its transition to the <sup>3</sup>P-levels is a challenge for theory. For Bi<sup>-</sup> less is known experimentally and we analyze its structure and the relativistic contributions to it.</p>},
author = {Su, Yangluojia and Si, Ran and Yao, Ke and Brage, Tomas},
issn = {0953-4075},
language = {eng},
month = {05},
number = {12},
pages = {1--11},
publisher = {IOP Publishing},
series = {Journal of Physics B: Atomic, Molecular and Optical Physics},
title = {The structure and radiative lifetimes of negative ions homologous to N<sup>-</sup>},
url = {http://dx.doi.org/10.1088/1361-6455/ab19e3},
doi = {10.1088/1361-6455/ab19e3},
volume = {52},
year = {2019},
}