激光烧蚀铜产生原子和离子光谱线的研究  

Studies on Atomic and Ion Emission Spectrum Produced by Pulsed laser Ablation of Copper

作　　者：黄庆举[1] 

机构地区：[1]茂名学院物理系,广东茂名525000

出　　处：《光子学报》2006年第12期1818-1822,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(29273130)资助

摘　　要：通过测定Nd∶YAG脉冲激光烧蚀金属Cu诱导产生光谱线及其强度随时间与空间的分布,结果表明等离子体辐射光谱线由原子光谱线、离子光谱线及连续辐射背景光组成,Cu原子光谱线的数目不仅比离子光谱线多,而且辐射强度比离子光谱线的大,以连续辐射背景光的辐射强度为最弱;原子光谱线的发光范围最大,持续时间最长;离子光谱线发光范围中等,持续时间中长;连续辐射背景光的发光范围最小,持续时间最短·讨论了激光诱导发光的机理,认为等离子体羽中连续辐射背景光主要来自近靶处高能电子的韧致辐射和电子与离子的复合激发,原子和离子光谱线主要由等离子体中高能电子的碰撞传能激发所引起,并用之较好地解释了所观察的实验现象·Based on time and spatial-resolved measurements of plasma emission spectrum by pulsed Nd ： YAG laser ablation of copper in argon was analyzed. The experimental results show that plasma emission spectra were composed of atomic spectrum, ion spectrum and continuous radiation. The number and intensity of atomic spectrum was bigger and stronger than that of ion spectrum, the continuous radiation intensity was minimum, the atomic spectrum radiation region and duration were longer than that of ion spectrum,the continuous radiation region and duration were minimum. Combining with the temporal arid spatial distribution spatial distribution species radiation intensity, the detailed mechanism of the generation of laser induced species radiation was discussed, the continuous radiation comes from the Bremsstrublung emission of energetic electrons ejected from the target and recombination of electron and ion near target, the primary mechanism of atomic excitation and ion excitation in plasma is inelastic collision between the elemental species and high-kinetic energy electron, the model can explain the experimental results qualitatively.

关 键 词：脉冲激光 发射光谱 烧蚀 金属Cu 

分 类 号：TN249[电子电信—物理电子学] O536[理学—等离子体物理]