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介绍了一种核径迹探测器CR - 39塑料的特性 .这种探测器对带电粒子非常灵敏 .它还具有稳定、透明等特点 ,可记录 p、α粒子 ,裂变碎片和其他带电粒子 ,它是现有固体核径迹探测器中能量沉积密度探测阈最低的材料 .介绍了CR - 39对带电粒子的响应 ,给出了各种带电粒子的vT 对限定能量损失 (REL)的响应曲线 .利用CR - 39与转换屏的组合还可测定能量范围广的中子能谱 ,可作为方便的个人中子剂量计 .介绍了CR - 39在研究中子、带电粒子引起的核反应产物、角分布和反应截面等特性以及在α粒子剂量学和环境科学尤其是氡剂量学中的应用 .此外 ,CR - 39已成功用于生物医学中放射性水平极低的生物组织切片α放射性分析 .
A nuclear track detector CR - 39 plastic is introduced, which is very sensitive to charged particles. It is also stable and transparent and can record p, α particles, fission fragments and other charged particles. Is the lowest energy deposition density detection threshold in the existing solid nuclear track detectors.The response of CR - 39 to charged particles is introduced, and the response curve of vT to the limited energy loss (REL) of various charged particles is given. The neutron energy spectrum of wide range of energy can be measured by the combination of CR - 39 and conversion screen, which can be used as a convenient personal neutron dosimeter.An introduction of CR - 39 in the study of neutron, charged particle - induced nuclear reaction products, angular distribution And reaction cross - sections, as well as applications in alpha - particle dosimetry and environmental science, especially radon dosimetry. In addition, CR - 39 has been successfully used in α - radioactivity analysis of biological tissue sections with very low levels of radioactivity in biomedicine.