铀原子多色三光子共振电离谱研究  

The Multicolour Three-photon Resonant Ionization Spectrum Studies in Uranium Atom

作　　者：史桂珍[1] 杜海[1] 王岚[1] 金昌泰[1] 王文韵[1] 周大凡[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《光谱学与光谱分析》2000年第1期5-8,共4页Spectroscopy and Spectral Analysis

摘　　要：利用Nd∶YAG二倍频激光同步泵浦的脉冲染料激光系统、原子束装置、飞行时间质谱和Boxcar技术测量了2 38U的多色三光子共振电离谱。研究了电场对铀原子第一激发态的影响。解决了如何确定三色三光子共振电离谱图中所含的单色、双色和三色共振电离峰的问题。The multicolour three photon resonant ionization spectra of 238 U were measured by using the pulsed dye lasers system synchronously pumped by a frequency doubled Nd:YAG laser 532 nm output(operated at 10 Hz),a device for atomic beam of U,time of flight mass spectrometer and boxcar integrator.The dye laser pulses have a 6 ns duration.Beams from the dye lasers,which have the same polarization direction and are focused by lenses,entered an interaction chamber through opposite windows on a common axis and spatialy overlapped the U atomic beam.The optical pulse from dye laser DL2 was delayed to arrive at the interaction region 8 ns after the pulse from dye laser DL1;in the same way,the pulse from DL3 was delayed 8 ns after from DL2.The atomic beam device was made from stainless steel.We generated the U vapor by heating solid U in a graphite crucible by e type electron field on first excited states were studied in uranium atom.The question how to determine single colour,two colour and three colour three photon resonant ionization peak in the three colour three photon resonant ionization spectra diagram were solved.

关 键 词：铀原子 共振电离谱 三色三光子 原子光谱 

分 类 号：O614.62[理学—无机化学] O562.4[理学—化学]