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用激光溅射法产生并在射频离子阱中囚禁了碳原子簇离子,进而利用离子阱的质量选择存储和离子存储时间长等特点,研究了经过选择存储的碳原子簇离子在离子阱中的碰撞解离和碰撞缔合。根据碰撞解离的结果以及碰撞前后的焓变,分析了团簇离子发生碰撞解离的条件和吸热范围,以及团簇离子的囚禁工作点与碰撞活化的关系。在此基础上,进一步研究了团簇离子碰撞解离后的各碎片之间发生缔合反应的过程,探讨了计算有效碰撞截面的方法。
By using the laser sputtering method, the carbon cluster ions are trapped in the RF ion trap. Based on the characteristics of the ion trap, such as mass selective storage and long ion storage time, the selective storage of carbon cluster ions in the ion trap Collision dissociation and collision association. Based on the results of collision and dissociation and the enthalpy changes before and after the collision, the conditions of collision and dissociation of cluster ions and the range of endotherm were analyzed. The relationship between the trapped working point of cluster ions and collision activation was analyzed. On this basis, the process of the association reaction between the fragments after cluster ion collision and dissociation was further studied, and the method of calculating the effective collision cross section was discussed.