Lifetime measurements using two-step laser excitation for high-lying even-parity levels and improved theoretical oscillator strengths in Y II

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

We report new time-resolved laser-induced fluorescence lifetime measurements for 22 highly excited even-parity levels in singly ionized yttrium (Y II). To populate these levels belonging to the configurations 4d6s, 5s6s 4d5d, 5p2, 4d7s and 4d6d, a two-step laser excitation technique was used. Our previous pseudo-relativistic Hartree-Fock model (Biémont et al. 2011) was improved by extending the configuration interaction up to n = 10 to reproduce the new experimental lifetimes. A set of semi-empirical oscillator strengths extended to transitions falling in the spectral range λλ194-3995 nm, depopulating these 22 even-parity levels in Y II, is presented and compared to the values found in the Kurucz's data base (Kurucz 2011).

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • University of Mons
  • University of Liège
  • Malmö University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Astronomi, astrofysik och kosmologi

Nyckelord

Originalspråkengelska
Sidor (från-till)532-540
Antal sidor9
TidskriftMonthly Notices of the Royal Astronomical Society
Volym471
Utgivningsnummer1
StatusPublished - 2017 jan 1
PublikationskategoriForskning
Peer review utfördJa