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Radiative lifetime and oscillator strength determinations in Sm III

Biémont, E; Garnir, H P; Litzén, Ulf LU ; Nielsen, Krister LU ; Quinet, P; Svanberg, Sune LU ; Wahlgren, Glenn LU and Zhang, Zhiguo (2003) In Astronomy & Astrophysics 399(1). p.343-349
Abstract
Radiative lifetimes of 6 levels belonging to the4f<SUP>5</SUP>(<SUP>6</SUP>H<SUP>deg</SUP>,<SUP>6</SUP>F<SUP>deg</SUP>)5d configuration of Sm III have beenmeasured for the first time using a time-resolved laser-inducedfluorescence technique. Experimental data have been compared withsemi-empirical calculations. The agreement is excellent for 4 levelswith <SUP>6</SUP>F<SUP>deg</SUP> as a parent term. Larger discrepancies(53 and 37) are observed for 2 levels with <SUP>6</SUP>H<SUP>deg</SUP>and <SUP>6</SUP>F<SUP>deg</SUP>, respectively, as a parent term and areexplainable by strong mixing and cancellation effects... (More)
Radiative lifetimes of 6 levels belonging to the4f<SUP>5</SUP>(<SUP>6</SUP>H<SUP>deg</SUP>,<SUP>6</SUP>F<SUP>deg</SUP>)5d configuration of Sm III have beenmeasured for the first time using a time-resolved laser-inducedfluorescence technique. Experimental data have been compared withsemi-empirical calculations. The agreement is excellent for 4 levelswith <SUP>6</SUP>F<SUP>deg</SUP> as a parent term. Larger discrepancies(53 and 37) are observed for 2 levels with <SUP>6</SUP>H<SUP>deg</SUP>and <SUP>6</SUP>F<SUP>deg</SUP>, respectively, as a parent term and areexplainable by strong mixing and cancellation effects occurring in theline strength calculations which are responsible of instabilitiesoccurring in the lifetimes considered as a function of J value withinthe term. Branching ratios for the lines depopulating the levels ofinterest have been measured by Fourier transform spectroscopy. A firstset of oscillator strengths has been deduced for this ion. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
atomic processes, atomic data, stars: chemically peculiar
in
Astronomy & Astrophysics
volume
399
issue
1
pages
343 - 349
publisher
EDP Sciences
external identifiers
  • wos:000180827300042
  • scopus:0037323698
ISSN
0004-6361
DOI
10.1051/0004-6361:20021797
language
English
LU publication?
yes
id
b4846cfc-f08a-4b2e-bbf5-a7c244c5a5fe (old id 130589)
date added to LUP
2007-07-12 14:16:14
date last changed
2018-05-29 09:56:48
@article{b4846cfc-f08a-4b2e-bbf5-a7c244c5a5fe,
  abstract     = {Radiative lifetimes of 6 levels belonging to the4f&lt;SUP&gt;5&lt;/SUP&gt;(&lt;SUP&gt;6&lt;/SUP&gt;H&lt;SUP&gt;deg&lt;/SUP&gt;,&lt;SUP&gt;6&lt;/SUP&gt;F&lt;SUP&gt;deg&lt;/SUP&gt;)5d configuration of Sm III have beenmeasured for the first time using a time-resolved laser-inducedfluorescence technique. Experimental data have been compared withsemi-empirical calculations. The agreement is excellent for 4 levelswith &lt;SUP&gt;6&lt;/SUP&gt;F&lt;SUP&gt;deg&lt;/SUP&gt; as a parent term. Larger discrepancies(53 and 37) are observed for 2 levels with &lt;SUP&gt;6&lt;/SUP&gt;H&lt;SUP&gt;deg&lt;/SUP&gt;and &lt;SUP&gt;6&lt;/SUP&gt;F&lt;SUP&gt;deg&lt;/SUP&gt;, respectively, as a parent term and areexplainable by strong mixing and cancellation effects occurring in theline strength calculations which are responsible of instabilitiesoccurring in the lifetimes considered as a function of J value withinthe term. Branching ratios for the lines depopulating the levels ofinterest have been measured by Fourier transform spectroscopy. A firstset of oscillator strengths has been deduced for this ion.},
  author       = {Biémont, E and Garnir, H P and Litzén, Ulf and Nielsen, Krister and Quinet, P and Svanberg, Sune and Wahlgren, Glenn and Zhang, Zhiguo},
  issn         = {0004-6361},
  keyword      = {atomic processes,atomic data,stars: chemically peculiar},
  language     = {eng},
  number       = {1},
  pages        = {343--349},
  publisher    = {EDP Sciences},
  series       = {Astronomy & Astrophysics},
  title        = {Radiative lifetime and oscillator strength determinations in Sm III},
  url          = {http://dx.doi.org/10.1051/0004-6361:20021797},
  volume       = {399},
  year         = {2003},
}