采用时间与空间分辨光谱测量技术,研究了在Ar气为缓冲气体下,用脉冲Nd∶YAG激光烧蚀Al产生等离子体的发射光谱及其随气压的变化规律,对粒子的激发机理进行了讨论,认为特征谱线是由复合辐射为主要机理,并用此结论在一定程度上解释了实验结果。 Using time and space-resolved spectroscopic techniques, the emission spectra of plasma generated by pulsed Nd: YAG laser ablation under Ar gas as buffer gas and its variation with pressure were studied, and the excitation mechanism of the particles was discussed It is considered that the characteristic line is composed of the composite radiation as the main mechanism, and this conclusion explains the experimental results to a certain extent.