Radiative lifetimes, branching fractions and oscillator strengths in PdI and the solar palladium abundance

被引：25

作者：

Xu, H. L. ^{[1
]}

Sun, Z. W.

Dai, Z. W.

Jiang, Z. K.

Palmeri, P.

Quinet, P.

Biemont, E.

机构：

[1] Jilin Univ, Dept Phys, Changchun 130023, Peoples R China

[2] Univ Laval, Dept Phys, Quebec City, PQ G1K 7P4, Canada

[3] Univ Mons, B-7000 Mons, Belgium

[4] Univ Liege, IPNAS, B-4000 Liege, Belgium

来源：

ASTRONOMY & ASTROPHYSICS | 2006年 / 452卷 / 01期

关键词：

atomic data; techniques : spectroscopic; stars : abundances;

D O I：

10.1051/0004-6361:20054610

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Transition probabilities have been derived for 20 5s-5p transitions of Pd I from a combination of radiative lifetime measurements for 6 odd-parity levels with time-resolved laser-induced fluorescence spectroscopy and of branching fraction determination using a hollow cathode discharge lamp. Additional oscillator strengths for 18 transitions have been determined from measured lifetimes and theoretical branching fractions obtained from configuration interaction calculations with core-polarization effects included. These new results have allowed us to refine the palladium abundance in the solar photosphere: A(Pd) = 1.66 +/- 0.04, in the usual logarithmic scale, a result in close agreement with the meteoritic value.

引用

页码：357 / 362

页数：6

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