摘要
为研究激光与材料相互作用的机制,获得激光等离子体的状态参数,利用XeCl准分子激光器（308 nm,～200mJ）烧蚀纯铜样品获得等离子体,使用光栅光谱仪获取了激光诱导的纯铜等离子体发射光谱.在局部热力学平衡（LTE）条件下,根据所选定特征谱线的相对强度,利用多谱线斜率法,计算得到等离子体激发温度为1.6×104K,并给出了等离子体温度的时间演化规律.通过拟合得出其特征谱线线形符合Lorentz线型.
In order to study the mechanism of laser interacting with materials,the parameters ralated to the laser plasma,the laser plasma is obtained by XeCl laser（308nm,～200mJ）ablating copper by grating spectrometer.Under the model of local thermodynamic equilibrium,the temperature of plasma is deduced to be nearly 1.6 × 104K,using multi-line slope by the ralative line intensities,and the time evolution of plasma temperature is achieved.It is concluded that the lineshape of the spectra lines broadening is fit for Lorentz lineshape.
出处
《沈阳理工大学学报》
CAS
2013年第6期49-52,57,共5页
Journal of Shenyang Ligong University
关键词
光谱学
激光诱导等离子体
多谱线斜率法
等离子体温度
谱线线型
spectroscopy
laser-induced breakdown spectroscopy
multi-line slope
temperature of plasma
line shape
