金属原子束横向速度及其分布的激光法测量  

Measurement of Atomic Vapor Traverse Velocity and VelocityDistribution Using Laser Induced Fluorescence

作　　者：孔羽飞[1] 王德武[1] 吕江华 应纯同[1] 

机构地区：[1]清华大学工程物理系

出　　处：《中国激光》1994年第1期16-20,共5页Chinese Journal of Lasers

摘　　要：本文介绍了一种利用金属原子谱线同位素位移的特性，由激光诱导荧光法采用线阵ＣＣＤ固体成像器件测量真空室内原子蒸气束横向最可几速度及速度分布的方法与装置。在点（４×６ｍｍ２）蒸发模型的情况下，实验结果表明：横向（ｘ轴）速度随ｘ线性增加，且其分布不受加热功率的影响；原子密度通量按速度的分布满足正态分布，其速度半宽度随加热而变化。This peper introduces method and its relative apparatus of using laser inducedfluorescence to measure the most traverse Probable velocity and veleocity distribution ofmetal atomic vapor born in vacuum chamber by means of the isotope spectrumtranslationand CCD device.In the CaSe Of the vapor model of 4×6 mm2,the experiment shows:themost transverse probable velocity increases linearly with x approximately and its distributionis not affeCted by the heating power;the transverse velocity distribution of atom density fluxmeets normal funCtion and the FHWM of velocity varies with the heating power.

关 键 词：原子蒸气 速度分布 激光测量 金属 

分 类 号：O562[理学—原子与分子物理]