2003A&A...399..343B


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.12CET11:59:03

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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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* GY And a2* 01 38 31.8241484792 +45 23 58.950612500   6.343 6.380     A2:VpSiSrCrEu 237 0
2 V* V816 Cen dS* 11 37 37.0411005456 -46 42 34.875395453 8.99 8.79 8.03     F8/G0p 285 0
3 V* MW Vul a2* 20 16 27.1968444581 +27 46 33.854994340   6.585 6.645     A0p 111 0

    Equat.    Gal    SGal    Ecl

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2019.12.12-11:59:03

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