摘要
利用真空紫外同步辐射和自制的飞行时间质谱（TOF－MS）仪，研究了环氧乙烷的光电离与光解离过程,通过测量各离子的光电高效率（PIE）曲线，获得了该分子的电离势和所有碎片离子的出现势．分析了离子的光电离解离通道，并讨论了它们的竞争情况．结合有关公认的热力学数据，算出它们的标准生成焓．
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 obtamed from then PIE curves.From these data, the formation enthalples of some chlef ions have been evaluated Possible channels and their comptition of chssociative photoionization of cthylene oxide have been discussed.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1999年第2期156-161,共6页
Acta Physico-Chimica Sinica
基金
国家自然科学基金
关键词
环氧乙烷
真空
紫外
光电离
生成焓
光解离
Ethylene oxide, Vacuum ultravio
et(VUV), Photoionization, Formatiou enthalpy
