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Radiation-induced fragmentation of fullerenes

机译:辐射引起的富勒烯断裂

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摘要

The radiation-induced fragmentation of the fullerenes C_36, C_60, C_70, and C_96 was investigated by tight-binding molecular dynamics simulations. The resulting fragment size and fragment charge distributions, averaged over large ensembles of trajectories corresponding to total ionization states up to +20e and excitation energies up to 300 eV, have been used to analyze the fragmentation statistics in terms of several derived quantities. A well-defined phase transition region is found in the total charge-excitation energy plane, which appears to be delimited by critical lines depending quadratically on the total ionization charge and linearly on the fullerene size.
机译:通过紧密结合的分子动力学模拟研究了富勒烯C_36,C_60,C_70和C_96的辐射诱导断裂。所产生的碎片大小和碎片电荷分布(对应于高达+ 20e的总电离状态和高达300eV的激发能)在大轨迹轨迹上取平均值,已用于根据几个导出的量来分析碎片统计数据。在总的电荷激发能平面中发现了一个明确定义的相变区域,该区域似乎由临界线界定,该临界线二次取决于总电离电荷,而线性取决于富勒烯的大小。

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