Acta Phys. -Chim. Sin. ›› 1997, Vol. 13 ›› Issue (07): 647-649.doi: 10.3866/PKU.WHXB19970715

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Vacuum-ultraviolet Photoion Spectrum of Vinyl Chloride Near Ionization Threshlod

Sheng Liu-Si,Qi Fei,Gao Hui,Zhang Yun-Wu,Yu Shu-Qin   

  1. National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230026|Department of Chemical Physics,University of Science and Technology of China,Hefei 230026
  • Received:1996-11-26 Revised:1997-02-05 Published:1997-07-15
  • Contact: Zhang Yun-Wu


The photoionization efficiency curve (PIE) of C2H3Cl+ formation from C2H3Cl has been measured in wavelength region 105.0- 130.0nm, by using synchrotron radiation single- photon ionization and a quadrupole mass spectromemter as a detector. A series of peaks in region 106.0-117.0nm arise from Rydberg autoionization converging to A2A' state of the vinyl chloride ion, the average quantum defects are δ(ns) = 1.87, δ(np) = 1.51,δ(nd) = 0.22 respectively. The Rydberg transitions of π(2a") → 4d, π(2a") →5d, π(2a")→6s, π(2a") →7s have been assigned also.

Key words: Synchrotron radiation, Photoionization, Vinyl chloride(C2H3Cl), Rydlberg state