延迟时间对灰岩激光诱导击穿光谱的影响

王阳恩

doi:doi:10.3964/j.issn.1000-0593(2013)05-1180-05

光谱学与光谱分析, 2013, 33 (5): 1180, 网络出版: 2013-05-21

延迟时间对灰岩激光诱导击穿光谱的影响

Influence of Delay Time on Laser-Induced Breakdown Spectroscopy of Limestone

论文大纲

王阳恩

作者单位

长江大学物理科学与技术学院, 湖北荆州434023

激光诱导击穿光谱延迟时间谱线强度指数拟合 Laser-induced breakdown spectroscopy Delay time Intensities of the spectral line Exponential fitting

摘要

为研究延迟时间对激光诱导击穿光谱信号强弱的影响, 从理论上讨论了光谱信号与延迟时间之间的关系, 利用RT100-HP激光诱导击穿光谱仪对标准样品合成灰岩GBW07716进行了测试, 分析了MnⅠ357.788 nm, WⅡ364.141 nm, WⅠ407.436 nm, WⅠ426.938 nm, CoⅠ387.312 nm等谱线随延迟时间的变化特征。得到随延迟时间的延长, 光谱信号按指数规律变弱, 不同谱线信号随延迟时间变化的快慢不相同。离子谱线在延迟时间短时其强度较强, 但随着延迟时间的延长, 离子谱线强度较原子谱线下降得更快些。对实验数据按指数规律进行了拟合, 其曲线的拟合系数R约0.99。

Abstract

In order to study the influence of delay time on laser-induced breakdown spectroscopy(LIBS), the relationship between the intensities of the spectral line and the delay time was discussed in theory, and the LIBS instrument manufactured by Applied Spectra Inc was used for testing the limestone certified reference sample GBW07716. The characteristic spectral line was analyzed with MnⅠ357.788 nm, WⅡ364.141 nm, WⅠ407.436 nm, WⅠ426.938 nm and CoⅠ387.312nm.It was demonstrated that the intensities of the spectral line decrease exponentially with the delay time, and the decrease speed is not the same for different spectral line. The intensities of the ion spectral line are stronger in an early stage, but decrease faster with the increase in delay time than the atomic spectral line. The experimental data fit with exponential law and the fitting R value is about 0.99.

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王阳恩. 延迟时间对灰岩激光诱导击穿光谱的影响[J]. 光谱学与光谱分析, 2013, 33(5): 1180. WANG Yang-en. Influence of Delay Time on Laser-Induced Breakdown Spectroscopy of Limestone[J]. Spectroscopy and Spectral Analysis, 2013, 33(5): 1180.

延迟时间对灰岩激光诱导击穿光谱的影响

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