Radiative lifetime measurements of some La I and La II levels by time-resolved laser spectroscopy

被引：11
|
作者：
Shang, Xue [1 ,2 ]
Tian, Yanshan [1 ,2 ]
Wang, Qian [1 ,2 ]
Fan, Shuang [1 ,2 ]
Bai, Wanshuang [1 ,2 ]
Dai, Zhenwen [1 ,2 ]
机构：
[1] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China
[2] Minist Educ, Key Lab Coherent Light Atom & Mol Spect, Changchun 130012, Peoples R China
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2014年 / 442卷 / 01期
基金：
中国国家自然科学基金;
关键词：
atomic data; atomic processes; methods: laboratory: atomic; techniques spectroscopic; PARITY LEVELS; LANTHANUM; SPECTRUM; STATES; ATOMS;
D O I：
10.1093/mnras/stu845
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Natural radiative lifetimes for 60 excited levels of La I and La II were measured using time-resolved laser-induced fluorescence spectroscopy in laser-induced plasma. The lifetimes of 40 excited levels of La I, in the energy range from 24 507.87 to 52 030.4 cm(-1), and 20 levels of La II, from 26 414.01 to 56 035.70 cm(-1), were measured in this work. The results of lifetimes range from 4.2 to 330 ns with the uncertainties within 10 per cent. To our best knowledge, 34 lifetimes of La I and 17 lifetimes of La II are reported for the first time.
引用
收藏
页码：138 / 141
页数：4
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