| 钾元素单脉冲和双脉冲激光诱导击穿光谱研究 |
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| 引用本文： | 张巧,胡振华,丁蕾,王颖萍,郑海洋.钾元素单脉冲和双脉冲激光诱导击穿光谱研究[J].原子与分子物理学报,2014,31(6). |
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| 作者姓名： | 张巧 胡振华 丁蕾 王颖萍 郑海洋 |
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| 作者单位： | 中国科学院合肥物质科学研究院安徽光学精密机械研究所,中科院合肥物质科学研究院安徽光学精密机械研究所,中科院合肥物质科学研究院安徽光学精密机械研究所,中科院合肥物质科学研究院安徽光学精密机械研究所,中科院合肥物质科学研究院安徽光学精密机械研究所 |
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| 摘 要： | 基于自行研制的新型液体射流的激光诱导击穿光谱(LIBS)实验装置，研究了实验条件(如积分延时、脉冲间隔、激光能量等)对K元素单脉冲LIBS和双脉冲LIBS等离子发射的影响.实验得知相对单脉冲激光激发，双脉冲激光激发可以显著提高等离子体发射谱线强度，增加谱线强度的衰减时间，提高LIBS数据的稳定性.通过最佳实验条件下K766.49nm谱线强度随溶液浓度的分析，得到该实验系统中，双脉冲激光激发时K元素的检测灵敏度和检测限约是单脉冲激光激发时的37倍.实验结果为双脉冲LIBS技术应用于水体金属的检测提供了一定依据.
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| 关 键 词： | 激光诱导击穿等离子发射光谱 单脉冲激光 双脉冲激光 检测限 |
| 收稿时间： | 3/4/2013 9:39:04 PM |
| 修稿时间： | 3/23/2013 1:42:50 PM |
Study on K single pulse- and double pulse-Laser induced breakdown spectroscopy |
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| Institution: | Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,,,, |
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| Abstract: | The effects of the experimental conditions (integration delay time, inter pulse delay time, laser energy and so on) on the KCl SP-LIBS(single pulse laser induced breakdown spectroscopy) and DP-LIBS(double pulse laser induced breakdown spectroscopy) were investigated using a self-developed new liquid jet. The intensity of line emission, time of line intensity-decay and LIBS stability were enhanced in DP-LIBS than SP-LIBS. It is found that the sensitivity and limit of detection (LOD) of K in DP-LIBS are 37 times those in SP-LIBS by curving the K 766.49nm spectra mean intensity with K metal concentration. The experimental results provide some basis for double pulse LIBS technique applying to the detection metallic elements in liquid. |
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| Keywords: | Laser-induced breakdown plasma emission spectroscopy Single-pulse laser dual-pulse laser limit of detection |
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