Plasma characteristic spectral line and its broadening mechanism of red copper
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摘要: 利用波长为1064 nm，最大能量为500 mJ的 Nd：YAG脉冲激光器对紫铜进行冲击，并且改变激光能量，获得一系列等离子体特征谱线，结果表明：本实验条件下，获得铜原子谱线不完整，只有5条明显激发谱线，分别为：CuⅠ 406.33 nm, CuⅠ 458.69 nm, CuⅠ 521.8 nm, CuⅠ 529.25 nm, CuⅠ 578.2 nm。根据跃迁原理，得出激光不能使铜原子完全受到激发；选取CuⅠ 521.8 nm原子光谱与CuⅠ 578.2 nm的原子光谱谱线线型作为分析对象，发现其展宽线型不同，分别为Lorenz线型与Gauss线型。通过对应线型曲线方程分析得出，同一原子光谱不同波段对应形成光谱展宽机制不同。
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关键词:
- 激光诱导等离子体光谱 /
- 紫铜 /
- 特征谱线 /
- 谱线展宽
Abstract: A series of plasma characteristic spectral lines of red copper were obtained under nanosecond laser shock with a pulsed Nd:YAG laser (1064 nm， maximum energy 500 mJ). It can be inferred from the experimental result that the copper atomic spectrum is incomplete, only five distinct excitation spectral lines (CuⅠ 406.33 nm, CuⅠ 458.69 nm, CuⅠ 521.8 nm, CuⅠ 529.25 nm, CuⅠ 578.2 nm) are found in our experimental condition. The line shapes of broadening of CuⅠ 521.8 nm and CuⅠ 578.2 nm atomic spectral lines are different, and belong to Lorenz and Gauss line shapes, respectively. The analysis of corresponding equations of line shapes shows that different bands in the same atomic spectrum correspond to different spectral broadening mechanisms. -
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