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

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Abstract

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.

Detaljer

Författare
  • Weijie Du
  • Martin Andersson
  • Ke Yao
  • Tomas Brage
  • Roger Hutton
  • Yaming Zou
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Den kondenserade materiens fysik
Originalspråkengelska
Artikelnummer145001
TidskriftJournal of Physics B: Atomic, Molecular and Optical Physics
Volym46
Utgåva nummer14
StatusPublished - 2013
PublikationskategoriForskning
Peer review utfördJa