钴、钛原子激发态光电离研究  

Investigation on the photoionization of the titanium and cobalt atoms

作　　者：胡行勇[1] 吴宏霞[1] 陈晓虎[1] 程阳阳[1] 姚关心[1] 郑贤锋[1] 季学韩[1] 崔执凤[1] 

机构地区：[1]安徽师范大学原子与分子物理研究所,芜湖241000

出　　处：《原子与分子物理学报》2011年第6期989-994,共6页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(20973001;11074003);留学回国人员科研启动基金(20091001)

摘　　要：本文报道紫外区钛和钴原子共振增强多光子电离(REMPI)谱和激发态绝对光电离截面.实验上通过激光烧蚀金属样品制备中性原子,由飞行时间质谱仪检测离子产物,在298～351nm范围扫描激光波长,得到钛原子和钴原子共振增强多光子电离谱;并根据共振离子信号强度与电离激光通量关系得到原子激发态的绝对光电离截面,这些激发态电离截面的实验值在0.5～4 Mb.We report the resonance enhanced multiphoton ionization （REMPI） spectra of the titanium at- oms and cobalt atoms and the absolute photoionization cross sections （PCSs） of the several excited states of Ti I and Co I. In the experiment, the atoms were produced by laser ablation of titanium and cobalt solid samples and the ions are detected using the time of flight mass spectrometer. Scanning laser wave- length in the range of 298-51 nm, we obtained the REMPI spectra of the titanium atoms and cobalt at- oms; scanning the laser intensity at a given resonance wavelength, we obtained the ion-signal intensity spectra and further obtained the absolute photoionization cross section of an excited state. The measured PCSs fall in the range of O.5-4 Mb.

关 键 词：钴原子 钛原子 REMPI 光电离截面 

分 类 号：O56[理学—原子与分子物理]