激等离子体线状光谱的辐射机制和时间演化过程分析  

INVESTIGATION OF THE MECHANISM OF LINE SPECTRA EMISSION AND THE TIME EVOLUTION PROCESS IN THE LASER-INDUCED HgCdTe PLASMA

作　　者：陈传松[1] 周新玲[1] 满宝元[1] 

机构地区：[1]山东师范大学物理与电子科学学院,济南250014

出　　处：《山东师范大学学报（自然科学版）》2007年第2期39-41,共3页Journal of Shandong Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(10474059)

摘　　要：利用波长为1064nm、脉宽为10ns的脉冲激光烧蚀Hg0.8Cd0.2Te晶体表面,由光学多道分析仪(OMA)记录其激光等离子体的时间分辨光谱.通过对等离子体线状谱的演化分析得知:等离子体的膨胀过程是一个原子不断被激发的能量交换过程;线状谱的发射机制是碰撞激发.The Q - swithched pulsed laser with a wavelength of 1 064 nm and a pulse duration of 10 ns was focused onto the surface of Hg0.8Cd0.2Te crystal, and the time - resolved spectra of the laser- induced plasma were recorded by the optical multichannel analyser（OMA）. Through analysis we can conclude that the expanssion of the plasma is a process of energy exchange involving particles being excited continuously. Also the mechanism of line spectrum emission is the excitation of collision.

关 键 词：激光等离子体 时间演化 线状谱的辐射机制 

分 类 号：O536[理学—等离子体物理]