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《Journal of Anhui Normal University(Natural Science)》 2010-01
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Investigation on the Photoionization of Titanium and Nickel in Exicited States

CHENG Yi,WU Hong-xia,HU Xing-yong,CONG Ran,FAN Jian-mei,YANG Jia-jun,JI Xue-han,ZHENG Xian-feng,CUI Zhi-feng(College of Physics and Electronic Information,Anhui Normal University,Wuhu 241000,China)  
The resonance-enhanced multiphoton ionization of Ti and Ni atoms has been investigated in the range of 285-320 nm.The atoms are produced by the laser ablation of a metal sample.The Ions produced from photoionization of the neutral atoms are monitored by a home-built TOF mass spectrometer.The photoionization cross sections of the excited states of Ti and Ni are deduced from the dependence of the correspending ion signal on the laser intensity with photon energies close to the ionization threshold,the assuming saturation of the resonant transition.The obtained values range from 0.2 Mb to 6.0 Mb.No significant isotope-dependence is found from the measurements of the photoionization cross sections of46Ti,47Ti,47Ti,58Ni,and60Ni.
【Fund】: Sponsored by the National Science Foundation of China(10674002 20973001 20703001)
【CateGory Index】: O562.4
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