高能重离子轰击非晶石墨中团簇的演化--II：形成和碎裂现象
Evolution of clusters in energetic heavy ion bombarded amorphous graphite-II: formation and fragmentation phenomena
摘要：
本文研究了高能重离子轰击无定形石墨时团簇的演化及其碎裂机制。不断发展的集群和他们随后的碎片下持续离子轰击揭示通过检测各种集群的能量谱中的直接发射的离子和表面成分之间的碰撞的结果。连续的直接反冲光谱表明，碳碳键形成的能量学以及随后的任何碎裂都与离子路径周围几埃的圆柱体积中的能量耗散过程有关。2个碳原子和双原子碳C2被认为是在这个圆柱体体积中的离子阻止能力的函数。
英文摘要：
A study has been conducted into the mechanisms of evolution of clusters and their subsequent fragmentation under energetic heavy ion bombardment of amorphous graphite. The evolving clusters and their subsequent fragmentation under continuing ion bombardment are revealed by detecting various clusters in the energy spectra of the Direct Recoils emitted as a result of collisions between ions and surface constituents. The successive Direct Recoil spectra reveal that the energetics of Carbon Carbon bond formation as well as any subsequent fragmentation can be related to the processes of energy dissipation in a cylindrical volume of a few Angstrom surrounding the ion path. The dependence of cluster with m carbon atoms formation or its subsequent fragmentation into cluster with m-2 carbon atoms and diatomic carbon C2 is seen to be a function of the ionic stopping powers in this cylindrical volume.
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