论文部分内容阅读
为了比较3种聚合物光纤在γ射线辐照下的辐照损伤特性的不同,通过分析3种聚合物光纤在辐照环境下的物理化学变化,并测量了聚甲基丙烯酸甲脂、聚碳酸脂、聚苯乙烯3种光纤在不同剂量γ射线辐照下可见光波段的辐照光谱,得到3种光纤辐照损伤特性的定量结果。在0.1kGy和1kGy辐照剂量时,3种光纤的透过率光谱趋势类似,整个可见光波段透过率光谱都较平坦;在5kGy和10kGy辐照剂量时,测得的辐照光谱在不同波长段出现峰值,辐照剂量越高,剂量率越大,光谱的峰值效果越明显,透过率起伏越多,透过率峰值也向长波段偏移。结果表明,光纤的辐照损伤和恢复都有波长相关性,这对核辐照环境下使用塑料光纤有很好的参考作用。
In order to compare the radiation damage characteristics of three kinds of polymer optical fibers irradiated by γ-rays, the physical and chemical changes of three kinds of polymer optical fibers under irradiation environment were analyzed, and the influences of polymethylmethacrylate, The radiation spectra of the three kinds of optical fibers with different dosages of γ-rays were measured and the quantitative results of the damage characteristics of the three kinds of optical fibers were obtained. At 0.1kGy and 1kGy irradiation doses, the optical transmittance spectra of the three fibers are similar and the transmittance spectrum of the whole visible light band is relatively flat. At 5kGy and 10kGy irradiation doses, the measured irradiation spectra are at different wavelengths The peak appears in the section. The higher the radiation dose and the larger the dose rate, the more obvious the peak value of the spectrum is. The more the transmittance is, the more the transmittance peak shifts to the long wavelength band. The results show that the optical fiber damage and recovery of irradiation have wavelength dependence, which is a good reference for the use of plastic optical fiber under nuclear irradiation environment.