中文摘要：

利用同步辐射真空紫外光，研究了HFC-152a（CH3CHF2）的光电离和光解离过程，通过测量各离子的光电离效率曲线，得到了该分子的电离能（11．94±0．04eV）和所有碎片离子的出现势，运用GAUSSIAN-03程序计算了母体和碎片及相应离子的结构、电子态和能量．结合理论计算的结果，分析了母体离子可能的光电离解离通道及相关通道的解离能．

英文摘要：

Photoionization and dissociative photoionization of HFC-152a have been studied using synchrotron radiation and a refleetron time-of-flight mass spectrometry （RTOF-MS）. The ionization energy of parent molecule （11.94 ± 0.04eV） and appearance potentials of various fragment ions have been determined by measuring their photoionization efficiency curves. Energies, symmetry point groups and ground electronic states of neutrals and cations of parent and its fragments have been calculated using GAUSSIAN-03 program with the G3 method. According to the theoretical and experimental results, some dissociation channels and their dissociation energies of CH3 CHF2^＋ have been analyzed.