Article (Scientific journals)
Theoretical and experimental lifetime determination in singly ionized neodymium (Nd II)
Xu, H. L.; Svanberg, S.; Cowan, R. D. et al.
2003In Monthly Notices of the Royal Astronomical Society, 346 (2), p. 433-440
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Keywords :
atomic data; atomic processes; stars : chemically peculiar
Abstract :
[en] 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.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Xu, H. L.
Svanberg, S.
Cowan, R. D.
Lefebvre, Pierre-Henri  ;  Université de Liège - ULiège > Département de géographie > Unité de Géomatique - Topographie et géométrologie
Quinet, Pascal  ;  Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie
Biémont, Emile ;  Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie
Language :
English
Title :
Theoretical and experimental lifetime determination in singly ionized neodymium (Nd II)
Publication date :
01 December 2003
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
Blackwell Publishing Ltd, Oxford, United Kingdom
Volume :
346
Issue :
2
Pages :
433-440
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 19 March 2010

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