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The structure and radiative lifetimes of negative ions homologous to N-

Su, Yangluojia; Si, Ran LU ; Yao, Ke and Brage, Tomas LU (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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organization
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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
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
2019-08-14 04:41:58
@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>},
  articleno    = {125002},
  author       = {Su, Yangluojia and Si, Ran and Yao, Ke and Brage, Tomas},
  issn         = {0953-4075},
  keyword      = {atomic structure,bound states,electron affinity,forbidden transitions,lifetimes,negative ions},
  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},
  volume       = {52},
  year         = {2019},
}