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Theoretical and experimental lifetime and oscillator strength determination in singly ionized neodymium (Nd II)

In English

Författare

  • Huailiang Xu
  • Sune Svanberg
  • RD Cowan
  • PH Lefebvre
  • P Quinet
  • E Biemont

Summary, in English

Radiative lifetime measurements were performed with time-resolved laser-induced fluorescence techniques for 24 levels of Nd II in the energy range 20 500- 32 500 cm(-1). For 17 levels, no previous experimental data exist. These results have allowed the testing of new theoretical calculations with the relativistic Hartree-Fock method taking configuration interactions and core-polarization effects into account, and a satisfying agreement has been found for this complex ion. A new set of calculated oscillator strengths, accurate within a few per cent for the strongest transitions, is presented for 107 lines of astrophysical interest appearing in the wavelength range 358.0-1100.0 nm. These results will be useful to evaluate abundance values of neodymium in chemically peculiar stars in relation with cosmochronology.

Avdelning/ar

Publiceringsår

2003

Språk

Engelska

Sidor

433-440

Publikation/Tidskrift/Serie

Monthly Notices of the Royal Astronomical Society

Volym

346

Issue

2

Dokumenttyp

Artikel i tidskrift

Förlag

Oxford University Press

Ämne

  • Atom and Molecular Physics and Optics

Nyckelord

  • stars : chemically peculiar
  • atomic data
  • atomic processes

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1365-2966