Reference : Radiative lifetime and oscillator strength determinations in SmIII
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/27019
Radiative lifetime and oscillator strength determinations in SmIII
English
Biémont, Emile mailto [Université de Liège - ULg > Département de physique > Physique nucléaire, atomique et spectroscopie >]
Garnir, Henri-Pierre [Université de Liège - ULg > Département de physique > Physique nucléaire]
Litzen, U. [> > > >]
Nielsen, K. [> > > >]
Quinet, Pascal mailto [Université de Liège - ULg > Département de physique > Physique nucléaire, atomique et spectroscopie >]
Svanberg, S. [> > > >]
Wahlgren, G. M. [> > > >]
Zhang, Z. G. [> > > >]
Feb-2003
Astronomy and Astrophysics
E D P Sciences
399
1
343-349
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis Cedexa
[en] atomic processes ; atomic data ; stars : chemically peculiar
[en] Radiative lifetimes of 6 levels belonging to the 4f(5)((6)Hdegrees, (6)Fdegrees)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 (6)Fdegrees as a parent term. Larger discrepancies (53 and 37%) are observed for 2 levels with (6)Hdegrees and (6)Fdegrees, 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.
Researchers ; Professionals
http://hdl.handle.net/2268/27019

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