Acta Phys. -Chim. Sin. ›› 1997, Vol. 13 ›› Issue (04): 322-327.doi: 10.3866/PKU.WHXB19970408

• ARTICLE • Previous Articles     Next Articles

The Photoionization Investigations of van der Waals Cluster ArHCl

Li Yue,Wang Xiu-Yan,Zhang Xiao-Guang,Li Lian-Bin,Lou Nan-Quan,Sheng Liu-Si,Zhang Yun-Wu   

  1. State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023|University of Science and Technology of China,National Synchrotron Radiation Laboratory,Hefei 230026
  • Received:1996-09-02 Revised:1996-11-26 Published:1997-04-15

Abstract:

The photoionization processes of van der Waals (vdW) cluster ArHCl in a molecular beam have been investigated by using synchrotron radiation light source and photoionization mass spectrometer. The results show that the concentration of the ArHCl dimer is approximately given by the equation: α(ArHCl)%=1.79×10-8po1.5. The PIE curve of ArHCl has been given for the first time. The appearance potential of ArHCl+ is determined to be 12.52±0.03eV. Using the IP values of HCl obtained in our experiment, the bond dissociation energy of ArHCl+ is deduced to be 0.22±0.03eV. The theoretical calculations using Gaussian-94w indicate that the value is about 0.16eV. When Ar in the cluster is ionized, the intensity of ArHCl+ is obviously lower than that expected. It indicates that the charge transfer and dissociation processes have taken place in the system.

Key words: Clusters, Synchrotron radiation, Photoionization