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

[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 :

Pages :

433-440

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 19 March 2010

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