可用于原子光谱研究的激光共振电离飞行时间质谱系统  

Laser Resonance Ionization Time of Flight Mass Spectrometer System for Atomic Spectroscopy

作　　者：李云飞[1,2] 张钧尧 柴俊杰 魏少强[1] 陈晨 LI Yunfei;ZHANG Junyao;CHAI Junjie;WEI Shaoqiang;CHEN Chen(Research Institute of Physical and Chemical Engineering of Nuclear Industry,Tianjin 300180,China;National Key Laboratory of Particle Transport and Separation technology,Tianjin 300180,China)

机构地区：[1]核工业理化工程研究院,天津300180 [2]粒子输运与富集技术全国重点实验室,天津300180

出　　处：《真空与低温》2023年第5期486-493,共8页Vacuum and Cryogenics

摘　　要：为了开展原子能级结构研究,自主研制了一套结合激光共振电离与飞行时间质谱技术的试验系统。介绍了该系统的设计原理、整体结构、性能表征及应用实例。该系统主要包括将金属单质样品快速升温并形成原子蒸气的原子蒸发炉、基于Nd:YAG固体激光泵浦的脉冲染料激光的激光共振电离系统、采用双场加速和双场反射技术的飞行时间质量分析器。试验结果表明,系统的质量分辨率优于1300 FWHM,信号动态范围为3个数量级。利用此系统开展了金属钕的原子能级试验,获取了钕的同位素位移。该系统可在针对镧系、锕系元素的原子能级结构研究中发挥重要作用,解决同位素位移、自电离态能级等关键光谱数据缺失问题。A experiment system was built based on laser resonance ionization and time of flight mass spectrometer,which was used for measuring the parameters of the atomic energy level structure.The design principle,overall structure,properties characterization and application of the mass spectrometer system were described in detail.The system was consist of atomization furnace which used to heat up the metal sample to form atomic vapor,laser resonance ionization system based on pulsed dye laser pumped by Nd:YAG solid-state laser,time of fight mass analyzer which adopted double-field acceleration and double-field reflection technology.Experimental result showed that the mass resolution under the laser resonance ionization source was better than 1300 FWHM and the dynamic range was better than three orders of magnitude.Based on the mass spectrometer,the atomic energy level experiments of metal neodymium were conducted and the isotope shift was obtained.This system had great value in the aspect of atomic energy level structure research of the lanthanides and actinides to solve the problem of the lack of key spectroscopy parameters like isotope shift and autoionization states.

关 键 词：飞行时间质谱计 原子光谱 原子能级 激光 

分 类 号：TH714.14[机械工程—测试计量技术及仪器]