C60+离子在石英晶体中随入射角形成的离子轨迹:小通道中的大离子

IF 1.3 Q3 INSTRUMENTS & INSTRUMENTATION
H. Amekura, K. Narumi, A. Chiba, Y. Hirano, Keisuke Yamada, S. Yamamoto, Y. Saitoh
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引用次数: 1

摘要

石英(SiO2)晶体具有垂直于(0001)表面的固有柱状孔,由Si和O原子的三元和六元环(3MR和6MR)结构组成。较大孔隙(即6MRs)的直径约为0.49nm,而富勒烯(C60)离子的直径为0.7nm,即大于任何一种类型的孔隙。透射电子显微镜观察证明,在6 MeV C60离子注入下,在沟道条件下,即对(0001)表面的0°入射,离子轨迹大约是非沟道条件(即在这种情况下为7°入射)的两倍。随着能量从6MeV降低到1MeV,0°入射时的轨道长度比7°入射时下降得更陡。最后,在0°和7°入射角下的轨道长度变得相当,即,在1MeV照射下,沟道样效应消失。实验表明,C60离子的类沟道效应在石英晶体中产生,而沟道的尺寸小于C60离子。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Incident Angle Dependent Formation of Ion Tracks in Quartz Crystal with C60+ Ions: Big Ions in Small Channels
Quartz (SiO2) crystals possess intrinsic columnar pores perpendicular to (0001) surfaces, consisting of three- and six-membered ring (3MR and 6MR) structures of Si and O atoms. The diameters of the larger pores, i.e., 6 MRs, are ~0.49 nm, while the diameters of fullerene (C60) ions are 0.7 nm, i.e., larger than either type of the pores. Transmission electron microscopy observation evidenced approximately two times longer ion tracks in the channeling condition, i.e., 0° incidence to (0001) surface, than an off-channeling condition, i.e., 7° incidence in this case, under 6 MeV C60 ion injection. The track length at the 0° incidence decreases more steeply than that at the 7° incidence with decreasing the energy from 6 MeV to 1 MeV. Finally, the track lengths at the 0° and 7° incidences become comparable, i.e., the channeling-like effect disappears at 1 MeV irradiation. This study experimentally indicates that the channeling-like effect of C60 ions is induced in quartz crystals, while the sizes of the channels are smaller than the C60 ions.
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来源期刊
CiteScore
2.80
自引率
28.60%
发文量
27
审稿时长
11 weeks
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