Excitation Mechanism of C60^r＋ Ions

• 作者: J.Bernard L.Che R.Bredy S.Martin WeiBaoren
• 来源期刊: 近代物理研究所和兰州重离子加速器实验室年报：英文版
• 学科: 物理学
• 关键词: 碳分子离子 氩离子 电子励磁能量 弹性碰撞
• 年，卷（期）: 2003,（1）
• 页码范围: 93
• 页数: 1页
• 分类号: O561.5

摘要

Citation of the C60^4+ is the same in the two collisions. The strong C+ peak produced in Ar^+-C60 must be due to the elastic collisions (nuclear stopping), because the Ar+ is heavy enough to knock out the C^+ from C60 molecule. In general, the excitation energy depends on the projectile velocity, charge, and mass. Direct vibronic excitation by elastic collisions (nuclear stopping) is predicted for slow heavy ions, while the electronic excitation (electronic stopping) is dominant for fast ions[1]. For example, Schlatholter, et al.[2] found a strong velocity effect in collisions of He^+ with fullerene in the velocity range from 0.1 to 1 a.u. With increasing velocity, the C2 evaporation process decreases and the multi-fragmentation is linearly increasing.