Measurement of Photoionization Cross Sections of the Excited States of Titanium  

作　　者：Jia-jun Yang Xing-yong Hu Hong-xia Wu Jian-mei Fan Ran Cong Yi Cheng Xue-han Ji Guan-xin Yao Xian-feng Zheng Zhi-feng Cui 

机构地区：[1]Institute of Atomic and Molecular Physics, Anhui Normal University, Wuhu 242000, China

出　　处：《Chinese Journal of Chemical Physics》2009年第6期615-620,J0002,共7页化学物理学报（英文）

基　　金：V. ACKNOWLEDGMENTS This work is supported by the National Natural Science Foundation of China （No.10674002 and No.20973001） and the Science Foundation of Anhui Education Committee （No.ZD2007001-1）.

摘　　要：Resonance-enhanced multiphoton ionization of the titanium atoms has been investigated in the 293 321 nm wavelength. We couple a laser-ablated metal target into a molecular beam to produce free atoms. Ions produced from photoionization of the neutral atoms are monitored by a home-built time-of-flight mass spectrometer. Photoionization cross sections of the excited states of Ti I were deduced from the dependence of the ion signal intensity on the laser intensity for photon energies close to the ionization threshold. The values obtained range from 0.2 Mb to 6.0 Mb. No significant isotope-dependence was found from measurements of the photoionization cross sections of ^46Ti, ^47Ti, and ^48Ti.

关 键 词：Photoionization cross section Excited state TITANIUM 

分 类 号：O562.4[理学—原子与分子物理] O571.44[理学—物理]