Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (02): 156-160.doi: 10.3866/PKU.WHXB19990212

• ARTICLE • Previous Articles     Next Articles

VUV Photoionization and Photodissociation of Ethylene oxide by Synchrotron Radiation

Liu Fu-Yi, Sheng Liu-Si, Qi Fei, Gao Hui, Zhang Yun-Wu   

  1. National Synchrotron Radiation Laboratory,University of Science Technology of China,Hefei 230026|Department of Chemistry,University of Science Technology of China,Hefei 230026
  • Received:1998-04-06 Revised:1998-07-27 Published:1999-02-15
  • Contact: Zhang Yun-Wu

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Abstract:

 Photoionization and photodissociation of ethylene oxide are performed by using a time-of-flight mass spectrometer(TOF-MS) with vacuum ultraviolet(VUV) photons from Hefei synchrotron radiation source. The photoionization mass spectrum and the photoionization ef ficiency(PIE) curves of the fragment ions are measured. The appearance potentials of all the observed ions are obtained from then PIE curves. From these data, the formation enthalpies of some chief ions have been evaluated Possible channels and their competition of dissociative photoionization of ethylene oxide have been discussed.

Key words: Ethylene oxide, Vacuum ultraviolet(VUV), Photoionization, Formation enthalpy