Measurements and Calculations of Radiative Parameters for Odd-parity Levels in Nb ii

被引：4

作者：

Geng, Yidan ^{[1
]}

Liu, Yong ^{[2
]}

Zheng, Hongfeng ^{[1
]}

Yu, Ziqing ^{[1
]}

Wang, Ting ^{[1
]}

Quinet, Pascal ^{[3
,4
]}

Yan, Bing ^{[2
]}

Dai, Zhenwen ^{[1
]}

机构：

[1] Jilin Univ, Coll Phys, Minist Educ, Key Lab Phys & Technol Adv Batteries, Changchun 130012, Peoples R China

[2] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China

[3] Univ Mons, Phys Atom & Astrophys, B-7000 Mons, Belgium

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

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2022年 / 259卷 / 02期

基金：

中国国家自然科学基金;

关键词：

OSCILLATOR-STRENGTHS; TRANSITION-PROBABILITIES; BRANCHING FRACTIONS; THEORETICAL LIFETIMES; ELEMENTS; STARS;

D O I：

10.3847/1538-4365/ac5aad

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Experimental radiative lifetimes for 34 odd-parity levels belonging to 4d (3)5p and 4d (2)5s5s configurations of Nb ii were measured by the time-resolved laser-induced fluorescence method. The results range from 2.2 to 11.5 ns, and 30 of them were reported for the first time, as far as we know. The theoretical radiative lifetimes for these levels were also calculated by the pseudorelativistic Hartree-Fock method including core-polarization contributions (HFR+CPOL) and the fully relativistic multiconfiguration Dirac-Hartree-Fock method, and branching fractions for these levels were also calculated by HFR+CPOL. By combining the experimental lifetimes and the calculated branching fraction values, the semiempirical transition probabilities and oscillator strengths for 389 Nb ii lines were obtained.

引用

页数：6

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