高能重离子轰击非晶石墨中团簇的演化--III：带电团簇在高能重离子辐照下反冲的能谱
Evolution of clusters in energetic heavy ion bombarded amorphous graphite-III: Energy spectra of charged clusters recoiling from Xe+ irradiations
摘要：
本文报道了一种新的重离子诱导无定形石墨表面改性技术，并利用直接反冲光谱法研究了无定形石墨的团簇机理。在50-150 keV ~（+）辐照石墨表面时，在大反冲角下的连续能谱中，探测到了以直接电子束形式发射的带电团簇。离子束辐照表面提供溅射碳原子和团簇的环境。聚集发生在最稳定的聚集的表面。的光谱已经确定了集群机制在高通量照射下的非晶石墨在掠入射，重建的表面特征有关。重离子辐照诱导产生大范围的团簇并同时将其作为DR喷射的双重效应。
英文摘要：
We report on a novel technique of heavy ion induced surface modification and clustering mechanisms in amorphous graphite using Direct Recoil Spectrometry. The charged clusters emanating as Direct Recoils from 50-150 keV Xe+ irradiated graphite surface are detected in successive energy spectra at large recoil angles. Ion beams irradiated surface is shown to provide an environment of sputtered carbon atoms and clusters. The clustering occurs on the surface where the most stable ones accumulate. The spectra have identified clustering mechanisms operating in amorphous graphite under high fluence irradiations at grazing incidence that are related to the reconstructed surface features. Heavy ion irradiation induces the twin effects of producing a wide range of clusters and simultaneously ejecting these as DRs.
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