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在超声射流冷却条件下用VUV同步辐射研究了CH_3I分子的光电离过程.测定了CH_3I光电离及解离电离产生的CH_3I~+,CH_3~+和I~+的出现势,结合已确认的热力学数据,估算出体系中有关离子的标准生成焓、分子和分子离子的键能、自由基的质子亲合势及母体离子的解离能等数据对CH_3I分子VUV光解离电离通道进行了分析.
The photoionization of CH_3I molecules was studied by VUV synchrotron radiation under the conditions of ultrasonic jet cooling.The appearance potentials of CH_3I ~ +, CH_3 ~ + and I ~ + generated by photoionization and dissociation of CH_3I were measured. Combined with the confirmed thermodynamics Data to estimate the standard enthalpy of formation, the bond energies of molecular and molecular ions, the proton affinities of free radicals and the dissociation energies of the parent ions in the system. The VUV photodissociation channels of CH 3 I molecules were analyzed.