光谱学与光谱分析
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环境气氛对激光微等离子体辐射强度的影响
郭庆林,韩美英,张 雷,张秋琳,张金平,陈金忠
河北大学物理科学与技术学院,河北 保定 071002
Effect of Ambient Atmosphere on Laser Micro-Plasma Radiant Intensity
GUO Qing-lin, HAN Mei-ying, ZHANG Lei, ZHANG Qiu-lin, ZHANG Jin-ping, CHEN Jin-zhong
College of Physics Science & Technology,Hebei University,Baoding 071002,China
摘要 : 采用YJG-Ⅱ激光微区分析仪、组合式多功能光栅光谱仪和CCD数据采集处理系统构成的激光微等离子体光谱分析系统,以国家标准土壤样品(BGW07411)为样品,在Ar,He和不同He-Ar混合的环境气氛下,以Ca Ⅱ 393.367 nm,Ca Ⅱ 396.847 nm为分析线,实验研究了土壤激光微等离子体辐射强度。研究结果表明,He-Ar混合气氛环境等离子体发光时间、辐射强度均好于单一He,Ar环境气氛。当He-Ar混合气体分别为:He 66.7%,Ar 33.3%时,等离子体辐射强度明显增强,并在此条件下研究了辅助电极高度对激光微等离子体辐射强度的影响。当辅助电极高度为3 mm时,激光微等离子体的辐射强度达到最佳。
关键词 :激光微等离子体光谱;环境气氛;辐射强度
Abstract :The plasma radiant intensity was investigated by a laser micro-plasma spectral analysis system. The system consists of an YJG-Ⅱ laser micro-spectral analyzer and a CCD data acquisition and processing system. National standard soil samples were studied in the experiment under different ambient atmosphere with argon, helium and the mixture of argon and helium by using the analysis lines, Ca Ⅱ 393.367 nm and Ca Ⅱ 396.847 nm. The results of this research suggest that both the time of plasma illumination and the radiant intensity of plasma in an atmosphere of helium-argon mixture were better than that in pure helium or argon gas. The plasma radiant intensity was obviously enhanced when the proportion of helium and argon was 66.7% and 33.3%, respectively. Under these conditions, the influence of the height of auxiliary electrode on laser micro-plasma radiant intensity was also investigated. The maximum laser micro-plasma radiant intensity was reached when the height of auxiliary electrode was 3 mm.
Key words :Laser micro-plasma spectroscopy;Ambient atmosphere;Radiation intensity
收稿日期: 2008-10-13
修订日期: 2009-01-26
通讯作者:
郭庆林
E-mail: qlguo@hbu.edu.cn
引用本文:
郭庆林,韩美英,张 雷,张秋琳,张金平,陈金忠. 环境气氛对激光微等离子体辐射强度的影响[J]. 光谱学与光谱分析, 2009, 29(10): 2606-2609.
GUO Qing-lin, HAN Mei-ying, ZHANG Lei, ZHANG Qiu-lin, ZHANG Jin-ping, CHEN Jin-zhong . Effect of Ambient Atmosphere on Laser Micro-Plasma Radiant Intensity. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(10): 2606-2609.
链接本文:
https://www.gpxygpfx.com/CN/10.3964/j.issn.1000-0593(2009)10-2606-04
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https://www.gpxygpfx.com/CN/Y2009/V29/I10/2606
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