环氧树脂对伽马射线的屏蔽分析及耐辐照效应

摘要

Taking the epoxy resin as the research object in this paper ,shielding property of epoxy resin was analyzed in the energy of 0.001‐100 MeV ,and shielding test was carried by 60Co gamma ray .Besides ,the irradiation for epoxy resin was treated by 93.5 kGy gamma ray , w hile the density , macro photograph , mechanical property , micro morphology ,temperature resistance and infrared spectra of epoxy resin before and after irradiation were analyzed .The results show that the attenuation of the gamma ray by epoxy resin is mainly related to the photoelectric absorption in the low energy (E<0.01 MeV) ,is mainly related to the incoherent scattering in the intermediate energy (0.01 MeV < E< 10 MeV ) ,is mainly related to the incoherent scattering and pair production in nuclear field in the high energy (10 MeV< E<100 MeV) ,and the shiel‐ding property of epoxy resin by 60 Co gamma ray is general .T he irradiation of 93.5 kGy gamma ray results in the aging phenomenon of epoxy resin ,the decrease of density and the highest heat resistant temperature , the increase of mechanical property and the low ness of destruction level ,w hich show s the irradiation resistance of epoxy resin for 93.5 kGy gamma ray .%本文以环氧树脂为研究对象，分析了环氧树脂对能量范围在0.001～100 M eV的伽马射线的屏蔽性能，测试了环氧树脂对60 Co伽马射线的屏蔽性能，并对其进行了总剂量为93.5 kGy的伽马射线辐照处理，对辐照前后环氧树脂的密度、光学照片、力学性能、断面微观形貌、耐热性能和红外光谱进行了分析。结果表明：环氧树脂对低能（ E＜0.01 M eV ）伽马射线的衰减主要是光电吸收作用，对中能（0.01 M eV＜ E＜10 M eV ）伽马射线的衰减主要是非相干散射作用，对高能（10 M eV＜ E＜100 M eV ）伽马射线的衰减主要是非相干散射作用和电子对核效应作用，环氧树脂对60 Co伽马射线的屏蔽性能一般。93.5 kGy伽马射线辐照导致环氧树脂老化、密度和最大耐热温度降低、力学性能增大、破坏程度低，环氧树脂可耐93.5 kGy伽马射线辐照。