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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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author
; ; and
organization
publishing date
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
2025-04-04 14:26:29
@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}},
  keywords     = {{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}},
  doi          = {{10.1088/1361-6455/ab19e3}},
  volume       = {{52}},
  year         = {{2019}},
}