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Radiative lifetime measurements and oscillator strengths of astrophysical interest in HoIII

Zhang, Zhiguo; Somesfalean, Gabriel LU ; Svanberg, Sune LU ; Palmeri, P; Quinet, P and Biemont, E (2002) In Astronomy & Astrophysics 384(1). p.364-370
Abstract
Radiative lifetimes of three long-lived levels belonging to the 4f(10)5d configuration of Ho III have been measured, for the first time, using the time-resolved laser-induced fluorescence technique. A good agreement between the experimental lifetimes and theoretical results obtained within a multiconfigurational pseudo-relativistic Hartree-Fock (HFR) approach including core-polarization (CP) effects is observed provided an adequate scaling factor is applied to the <4f&VERBAR;r&VERBAR;5d> transition matrix element. From the comparison theory-experiment, it has been possible to assess the reliability of the oscillator strengths of the 4f-5d transitions of astrophysical interest, particularly for the lines depopulating the... (More)
Radiative lifetimes of three long-lived levels belonging to the 4f(10)5d configuration of Ho III have been measured, for the first time, using the time-resolved laser-induced fluorescence technique. A good agreement between the experimental lifetimes and theoretical results obtained within a multiconfigurational pseudo-relativistic Hartree-Fock (HFR) approach including core-polarization (CP) effects is observed provided an adequate scaling factor is applied to the <4f&VERBAR;r&VERBAR;5d> transition matrix element. From the comparison theory-experiment, it has been possible to assess the reliability of the oscillator strengths of the 4f-5d transitions of astrophysical interest, particularly for the lines depopulating the levels considered in the present work. The present results fill in a gap concerning the f-values of doubly ionized holmium and are needed for a quantitative evaluation of the holmium abundance in some peculiar stars. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
atomic processes, stars : chemically peculiar, atomic data
in
Astronomy & Astrophysics
volume
384
issue
1
pages
364 - 370
publisher
EDP Sciences
external identifiers
  • wos:000174185500035
ISSN
0004-6361
DOI
10.1051/0004-6361:20020014
language
English
LU publication?
yes
id
a0146bc9-e755-445c-809a-a84372e063e2 (old id 342640)
date added to LUP
2007-11-15 10:03:00
date last changed
2016-09-20 15:08:08
@article{a0146bc9-e755-445c-809a-a84372e063e2,
  abstract     = {Radiative lifetimes of three long-lived levels belonging to the 4f(10)5d configuration of Ho III have been measured, for the first time, using the time-resolved laser-induced fluorescence technique. A good agreement between the experimental lifetimes and theoretical results obtained within a multiconfigurational pseudo-relativistic Hartree-Fock (HFR) approach including core-polarization (CP) effects is observed provided an adequate scaling factor is applied to the &lt;4f&amp;VERBAR;r&amp;VERBAR;5d&gt; transition matrix element. From the comparison theory-experiment, it has been possible to assess the reliability of the oscillator strengths of the 4f-5d transitions of astrophysical interest, particularly for the lines depopulating the levels considered in the present work. The present results fill in a gap concerning the f-values of doubly ionized holmium and are needed for a quantitative evaluation of the holmium abundance in some peculiar stars.},
  author       = {Zhang, Zhiguo and Somesfalean, Gabriel and Svanberg, Sune and Palmeri, P and Quinet, P and Biemont, E},
  issn         = {0004-6361},
  keyword      = {atomic processes,stars : chemically peculiar,atomic data},
  language     = {eng},
  number       = {1},
  pages        = {364--370},
  publisher    = {EDP Sciences},
  series       = {Astronomy & Astrophysics},
  title        = {Radiative lifetime measurements and oscillator strengths of astrophysical interest in HoIII},
  url          = {http://dx.doi.org/10.1051/0004-6361:20020014},
  volume       = {384},
  year         = {2002},
}