紫铜等离子体特征谱线及其展宽形成机制  

Plasma characteristic spectral line and its broadening mechanism of red copper

作　　者：姚红兵[1,2] 邢博[1] Donna Strickland 周祝生[1] 丁桂林[1] 佟艳群[1] 平洁[1] 李良湾[1] 张永康[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]Department of Physics,Guelph-Waterloo Physics Institute,University of Waterloo,Waterloo,Ontario N2L 3G1,Canada

出　　处：《强激光与粒子束》2012年第9期2117-2120,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金重点项目(50735001);国家自然科学基金项目(10804037);中国博士后基金特别资助项目(200902506)

摘　　要：利用波长为1064nm,最大能量为500mJ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:CuⅠ406.33nm,CuⅠ458.69nm,CuⅠ521.8nm,CuⅠ529.25nm,CuⅠ578.2nm。根据跃迁原理,得出激光不能使铜原子完全受到激发;选取CuⅠ521.8nm原子光谱与CuⅠ578.2nm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。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.

关 键 词：激光诱导等离子体光谱 紫铜 特征谱线 谱线展宽 

分 类 号：O657.3[理学—分析化学]