| 纳秒激光诱导等离子体发射光谱中的自吸收效应 |
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| 引用本文： | 陈金忠,王敬,马瑞玲,李旭,王颖.纳秒激光诱导等离子体发射光谱中的自吸收效应[J].强激光与粒子束,2015,27(1):012002. |
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| 作者姓名： | 陈金忠 王敬 马瑞玲 李旭 王颖 |
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| 作者单位： | 1.河北大学 物理科学与技术学院, 河北 保定 071 002 |
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| 基金项目： | 国家自然科学基金项目(61205180); 河北省自然科学基金项目(A2006000951) |
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| 摘 要： | 为了减小激光诱导等离子体发射光谱中光谱线的自吸收效应,提高激光光谱分析技术对物质中高含量元素的检测水平,实验采用了一种平面反射镜装置约束等离子体,比较了有或无平面反射镜装置时光谱线的线型变化。实验表明,在无平面反射镜装置时,样品元素Al,Mg和Mn的光谱线半高全宽度分别为0.16,0.24,0.058nm,而采用由四块平面反射镜组成的装置在空间上约束激光等离子体时分别为0.11,0.13,0.047nm。结果表明,光谱线的自吸收明显减小,谱线线型变得比较锐且强度显著提高。通过观测等离子体照片,测量等离子体温度和电子密度,分析讨论了激光光谱自吸收效应降低的原因。
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| 关 键 词： | 激光诱导击穿光谱 高含量元素 自吸收效应 平面反射镜 电子温度 电子密度 |
| 收稿时间： | 2014/6/5 |
Self-absorption effect in nanosecond laser induced plasma emission spectrum |
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| Chen Jinzhong
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Wang Jing
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Ma Ruiling
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Li Xu
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Wang Ying.Self-absorption effect in nanosecond laser induced plasma emission spectrum[J].High Power Laser and Particle Beams,2015,27(1):012002. |
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| Authors: | Chen Jinzhong Wang Jing Ma Ruiling Li Xu Wang Ying |
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| Affiliation: | 1.College of Physics Science and Technology,Hebei University,Baoding 071002,China |
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| Abstract: | In order to reduce the self-absorption effect of spectral lines in the laser induced plasma emission, which could improve the detection level of laser spectral analysis technology for high-content elements in materials, a plane mirror device was used to constraint plasma in the experiment. The change of the spectral lines with or without the plane mirror device was compared. Without the plane mirror device, the half-maximum line widths of spectral line of the sample element Al, Mg and Mn were 0.16 nm, 0.24 nm and 0.058 nm, respectively. But they were 0.11 nm, 0.13 nm and 0.047 nm with four plane mirrors device constraining plasma. It shows that the self-absorption effect of spectral lines decrease significantly by the use of plane mirror device to restrain plasma on the space, while the spectral line becomes sharper and the intensity is improved significantly. By observing the plasma photos and measuring of plasma temperature and electron density, the reason to reducing the self-absorption effect in laser spectrum is discussed. |
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| Keywords: | laser-induced breakdown spectroscopy high-content elements self-absorption effect plane mirror electron temperature electron density |
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