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。

A new approach is developed to measure the dynamic characteristics of metal sheet under laser shock, including deformation velocity, strain, and strain rate. The detecting laser beam is partially shaded by the target deformation induced by the laser action. A photodiode transforms the received beam intensity real time into an electrical signal which could record the process of the target deformation. The functional relation between the electrical signal and the deformation of the metal sheet is derived. The deformation curve of a thin aluminum and the velocity curve of its deformation are also obtained during the experiment. The results indicate that the average velocity of the elastic deformation of the target can reach 2.999￡103 m/s in the central area. This new method provides an approach in the study of the effect of strain rate on deformation.