The observation of CR -39 Solid State Nuclear Track Detectors is an essential part of analysising its track structure and dosimetry. Proceeding from the theory of latent tracks'formation and growth in CR -39 detector , it discussed the effect factors of etched tracks, and studied the characteristics and contrast of two chosen track reading methods, which include the optic method and electronic microscope method. Based on this, the experiment was applied. The CR - 39 detectors, which were irradiated by Si ions with energy of 100 MeV and different fluence, were etched in NaOH etchant (70℃, 6. 2N) for 6 hours and 5 minutes separately. The tracks enlarged and in nano - scale were observed under optic microscope and Atomic Force Microscope. Moreover, bulk etch was measured with partial masked and surface profiler, and the bulk etch rate Vb = 1.53 μm/ h was got.%针对重离子辐射的CR - 39固体核径迹探测器中的微观径迹结构特点和剂量特征研究的必要步骤——探测器观测,从CR - 39中粒子潜径迹形成和发展出发,探讨了影响粒子径迹的因素,选取两种径迹观测方法——光学显微镜观测和电子显微镜观测进行对比分析.在此基础上进行了试验,用不同通量的100 MeV Si离子照射CR - 39探测器,将实验样品用NaOH溶液(70℃,6.25 N)分别进行6h和5 min的刻蚀.刻蚀后,用光学显微镜和原子力显微镜进行观察,得到了放大的径迹和纳米尺度的微观径迹.此外,局部覆盖刻蚀后用台阶仪进行观测,得到了体刻蚀速率为Vb =1.53 μm/h.
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