Zeeman effect of weak La I lines investigated by the use of optogalvanic spectroscopy

被引：14
作者：
Sobolewski, L. M. [1 ,2 ]
Windholz, L. [2 ]
Kwela, J. [1 ]
机构：
[1] Univ Gdansk, Inst Expt Phys, Fac Math Phys & Informat, PL-80308 Gdansk, Poland
[2] Graz Univ Technol, Inst Expt Phys, Petersgasse 16, A-8010 Graz, Austria
来源：
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2017年 / 189卷
关键词：
HYPERFINE-STRUCTURE; LANTHANUM SPECTRA; BI I; LA-139;
D O I：
10.1016/j.jqsrt.2016.11.027
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
New Lande-gj factors of 35 energy levels of La I, found from investigations of 40 spectral lines in the Wavelength range 562.959/609.537 nm, were determined. As a source of free La atoms a hollow cathode discharge lamp was used. We monitored the signal of the optogalvanic effect appearing When a laser beam is passing through the hollow cathode. Spectra were recorded in the presence of a magnetic field of about 800 G produced by a permanent magnet, for two linear polarizations of the exciting laser light. Optogalvanic spectroscopy is a very sensitive method, so we were able to observe the Zeeman effect of very weak atomic lines. In this way we have determined for the first time the Lande-gj factors for 35 recently found levels of neutral La. The Lande gj- factors for several other levels were reinvestigated. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：221 / 227
页数：7
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