关键词：电池材料；化学反应；离子轨道
摘 要：When an energetic ion passes through a material, an ion track may be produced along the ion path if the electronic stopping power S_e is larger than a material dependent threshold value. Although there are a number of studies on the ion tracks produced in crystalline materials using transmission electron microscopy (TEM), there are only a limited number of TEM studies on the ion tracks in amorphous materials due to a lack of sufficient contrast. In this report, the ion tracks in amorphous Si_3N_4 films irradiated with 120-720 keV C_(60)~(+,2+) ions were observed with TEM and high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM). The radial density distribution of the ion track was derived from the observed HAADF-STEM images.