[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
