Lifetime measurements in Ru II and calculated oscillator strengths in Ru II and Ru III

[en] A new set of theoretical f -values is reported for 178 Ru II transitions of astrophysical interest, involving energy levels below 58 000 cm−1. The theoretical model, including core-polarization effects, has been tested by comparing theoretical lifetimes with new measurements performed by time-resolved laser-induced fluorescence spectroscopy for 23 4d6(5D)5p odd levels of Ru II and by comparing theoretical and experimental Land´e g-factors. The first set of transition probabilities is proposed for 25 strong lines depopulating the 4d55p 5,7P◦ terms of Ru III. The new results will allow quantitative investigations of stellar spectra and allow the astrophysicists to refine the ruthenium abundance in stars.

Disciplines :

Physics

Author, co-author :

Palmeri, P.

Quinet, Pascal ; Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie

Fivet, V.

Biémont, Emile ; Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie

Cowley, C. R.

Engström, L.

Lundberg, H.

Hartman, H.

Nilsson, H.

Language :

English

Title :

Lifetime measurements in Ru II and calculated oscillator strengths in Ru II and Ru III

Publication date :

2009

Journal title :

Journal of Physics : B Atomic Molecular and Optical Physics

ISSN :

0953-4075

eISSN :

1361-6455

Publisher :

Institute of Physics, Bristol, United Kingdom

Volume :

Pages :

1-12

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 19 March 2010

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