Fraunhofer-type absorption line splitting and polarization in confocal double-pulse laser induced plasma

被引：9
|
作者：
Nagli, Lev [1 ]
Gaft, Michael [1 ]
机构：
[1] Laser Distance Spectrometry LTD, IL-49514 Petah Tiqwa, Israel
来源：
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2013年 / 88卷
关键词：
Laser-induced breakdown spectroscopy; Fraunhofer lines; Polarization; Splitting; INDUCED BREAKDOWN SPECTROSCOPY; MAGNETIC-FIELD; EMISSION; HOT;
D O I：
10.1016/j.sab.2013.06.009
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Strong line splitting and polarization are observed in Fraunhofer-type absorption lines in Pb, Sn, Si, Cd, In, and Zn in confocal double-pulse laser induced plasma (DP-LIP) experiments. This effect is detectable using medium laser power densities: (similar to 1-2) x 10(13) W/m(2) for the first laser pulse and 1 x 10(14) W/m(2) for the second laser pulse. Polarization and splitting effects exist only during the second laser pulse (similar to 7 ns). Absorption line polarization and splitting phenomena may be explained by a high overall magnetic field and motional Stark effect caused by the second laser pulse inside the laser plasma created by the first pulse. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：127 / 135
页数：9
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