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Lifetimes of the hyperfine levels of 3d(9)4s D-3(3) in high-Z Ni-like ions

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Author

  • Weijie Du
  • Martin Andersson
  • Ke Yao
  • Tomas Brage
  • Roger Hutton
  • Yaming Zou

Summary, in English

Based on the multi-configuration Dirac-Hartree-Fock method and using the GRASPVU package, a theoretical investigation was performed to study the lifetimes of hyperfine levels of the first excited level 3d(9)4s D-3(3) in Ni-like ions (Z = 72-79) for all stable isotopes with nuclear spin. Comparisons between hyperfine-induced electric quadrupole transition rates and the pure magnetic octupole transition rates show that the extra electric quadrupole transition channel caused by the nuclear magnetic dipole and electric quadrupole hyperfine interaction is important for most hyperfine levels in each individual ion. Lifetimes of most hyperfine levels are sensitive to this extra decay channel. Extreme cases are found in Ta-181, Re-185 and Re-187, where lifetimes of some hyperfine levels are shortened by more than an order of magnitude.

Publishing year

2013

Language

English

Publication/Series

Journal of Physics B: Atomic, Molecular and Optical Physics

Volume

46

Issue

14

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Condensed Matter Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0953-4075