Radiative lifetime and oscillator strength determinations in Sm III

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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 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.

Detaljer

Författare
  • E Biémont
  • H P Garnir
  • Ulf Litzén
  • Krister Nielsen
  • P Quinet
  • Sune Svanberg
  • Glenn Wahlgren
  • Zhiguo Zhang
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Astronomi, astrofysik och kosmologi
  • Atom- och molekylfysik och optik

Nyckelord

Originalspråkengelska
Sidor (från-till)343-349
TidskriftAstronomy & Astrophysics
Volym399
Utgåva nummer1
StatusPublished - 2003
PublikationskategoriForskning
Peer review utfördJa

Nedladdningar

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Relaterad forskningsoutput

Nielsen, K., 2002, Krister Nielsen, Nobelvägen 147 I, 212 15 Malmö,. 134 s.

Forskningsoutput: AvhandlingDoktorsavhandling (sammanläggning)

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