SIMBAD references

2003A&A...399..343B - Astronomy and Astrophysics, volume 399, 343-349 (2003/2-3)

Radiative lifetime and oscillator strength determinations in Sm III.

BIEMONT E., GARNIR H.P., LITZEN U., NIELSEN K., QUINET P., SVANBERG S., WAHLGREN G.M. and ZHANG Z.G.

Abstract (from CDS):

Radiative lifetimes of 6 levels belonging to the 4f5(6H°, 6F°)5d configuration of Sm III have been measured for the first time using a time-resolved laser-induced fluorescence technique. Experimental data have been compared with semi-empirical calculations. The agreement is excellent for 4 levels with 6F° as a parent term. Larger discrepancies (53 and 37%) are observed for 2 levels with 6H° and 6F°, respectively, as a parent term and are explainable by strong mixing and cancellation effects occurring in the line strength calculations which are responsible of ``instabilities'' occurring in the lifetimes considered as a function of J value within the term. Branching ratios for the lines depopulating the levels of interest have been measured by Fourier transform spectroscopy. A first set of oscillator strengths has been deduced for this ion.

Abstract Copyright:

Journal keyword(s): atomic processes - atomic data - stars: chemically peculiar

Simbad objects: 3

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2021.03.01-08:46:25

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