【摘要】 在分析了塑料光纤耐辐照机理的基础上，讨论了一种聚合物塑料光纤的辐照特性，该塑料光纤由一种改良的聚碳酸酯聚合物材料组成．用γ－射线、电子束、质子束三种辐射源分别对其进行照射．结果发现，在低剂量（＜ １ ｋＧｙ）辐照时，辐照后塑料光纤的透过率非但没有下降，反而有所上升；尔后随时间的推移，透过率趋于稳定值．在高剂量（＞ １ ｋＧｙ）辐照时，辐照后透过率降低，随着时间的推移，透过率逐渐回升至稳定值．更多还原

【Abstract】 The radiation characteristics of one kind of polymeric fiber were studied. This type of plastic optical fiber is composed of a reformed polycarbonate. While being radiated by γ ray, electron beam and proton beam respectively, it was found that under the low radiation dose (below 1 kGy) the plastic optical fiber’s transmission rate would rise instead of being descended. After a period of time, it gradually reaches a constant value. But under the high radiation dose (1 kGy or more) the fiber’s transmission descends after radiation. Later, it gradually goes up to a constant value. The anti radiation characteristics mechanism of plastic optical fiber was also described and analyzed.更多还原