In the interaction process of a swift heavy ion ( SHI) and polymer, a latent track with radius of several nanometers appears near the ion trajectory due to the dense ionization and excitation. 快重离子辐照聚合物材料时,由于密集电离激发在其路径上产生几纳米直径的潜径迹,径迹形貌受离子种类、离子能量等多种因素的影响。