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Doubly ionized thorium: Laser lifetime measurements and transition probability determination of interest in cosmochronology

Biemont, E; Palmeri, P; Quinet, P; Zhang, Zhiguo and Svanberg, Sune LU (2002) In Astrophysical Journal 567(2). p.1276-1283
Abstract
The first lifetime measurements have been performed for six levels of doubly ionized thorium, an important cosmochronometer in astrophysics for estimating the age of the Galaxy. The levels, belonging to the 5f(2), 5f7p, 7s7p, and 6d7p configurations of Th III, have been measured by the time-resolved laser-induced fluorescence method and compared with relativistic Hartree-Fock calculations including configuration interaction and core-polarization effects. Taking advantage of the excellent agreement between theory and experiment, a first set of transition probabilities of astrophysical interest has been deduced for this ion from a combination of the experimental lifetimes and of the theoretical branching fractions.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
atomic data, methods : laboratory, peculiar, stars :, line : identification
in
Astrophysical Journal
volume
567
issue
2
pages
1276 - 1283
publisher
University of Chicago Press
external identifiers
  • wos:000174210400052
  • scopus:0037841406
ISSN
0004-637X
DOI
10.1086/338700
language
English
LU publication?
yes
id
7e37e577-8215-4b2a-a6a1-4aa5267f981f (old id 342634)
date added to LUP
2007-08-10 09:12:59
date last changed
2017-09-17 07:40:53
@article{7e37e577-8215-4b2a-a6a1-4aa5267f981f,
  abstract     = {The first lifetime measurements have been performed for six levels of doubly ionized thorium, an important cosmochronometer in astrophysics for estimating the age of the Galaxy. The levels, belonging to the 5f(2), 5f7p, 7s7p, and 6d7p configurations of Th III, have been measured by the time-resolved laser-induced fluorescence method and compared with relativistic Hartree-Fock calculations including configuration interaction and core-polarization effects. Taking advantage of the excellent agreement between theory and experiment, a first set of transition probabilities of astrophysical interest has been deduced for this ion from a combination of the experimental lifetimes and of the theoretical branching fractions.},
  author       = {Biemont, E and Palmeri, P and Quinet, P and Zhang, Zhiguo and Svanberg, Sune},
  issn         = {0004-637X},
  keyword      = {atomic data,methods : laboratory,peculiar,stars :,line : identification},
  language     = {eng},
  number       = {2},
  pages        = {1276--1283},
  publisher    = {University of Chicago Press},
  series       = {Astrophysical Journal},
  title        = {Doubly ionized thorium: Laser lifetime measurements and transition probability determination of interest in cosmochronology},
  url          = {http://dx.doi.org/10.1086/338700},
  volume       = {567},
  year         = {2002},
}