MeV氢微团簇离子与固体介质的电荷交换

利用静电加速器提供的0.6—1.8MeV的H⁺，H⁺₂，H⁺₃离子，轰击不同厚度的碳膜，分别测量这些离子通过碳膜后各种产物的产额. 得到了不同能量的H⁺通过碳膜后中性原子H和负离子H^-的产额随入射质子速度的变化关系；分别得到能量为1.2MeV,1.8MeV的H⁺₂，H⁺₃团簇离子通过不同厚度碳膜的透射产额及其与团簇离子在碳膜中驻留时间的关系；对结果进行了理论分析与讨论. 关键词： 团簇离子 电荷交换

The electron exchange of MeV hydrogen micro-cluster ions with solids

The products of fast ions H⁺, H⁺₂ and H⁺₃ with the energy of 0.6 to 1.8MeV passing through carbon films were measured. The yields of neutral atom H and negative ion H^- for H⁺ at energies of 0.6,0.9,1.2,1.6 and 1.8MeV were obtained, respectively. The fitted yield curves as function of velocity of projectile agreed with experimental results very well. The transmission of H⁺₂, H⁺₃ at energies 1.2MeV and 1.8MeV through carbon film were also measured. The fitted transmission curves as function of dwell time of H⁺₂, H⁺₃ in carbon film were also obtained. Theoretical analysis and discussion on the electron loss and capture possibility in solids were made.