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

Research output: Contribution to journalArticle

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 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.

Details

Authors
Organisations
External organisations
  • Fudan University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Theoretical Chemistry

Keywords

  • atomic structure, bound states, electron affinity, forbidden transitions, lifetimes, negative ions
Original languageEnglish
Article number125002
Pages (from-to)1-11
Number of pages11
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume52
Issue number12
Publication statusPublished - 2019 May 28
Publication categoryResearch
Peer-reviewedYes