采用静电电位计测量经^60Co伽玛射线源辐射的环氧树脂表面电位分布，结合频域介电谱和衰减全反射傅立叶变换红外光谱分析，研究总辐射量对材料表面电荷积聚特性的影响。结果表明，随着总辐射量的增大，表面电荷密度最大位及总电荷量均减小。文中认为伽玛线辐射引起的化学反应使环氧树脂表层的陷阱密度和能级发生变化，导致其表面电荷积聚能力下降。
This paper presented the study about the effect of the gamma-ray irradiation on the surface charge accumulation of the epoxy resin (ER) by the frequency domain spectroscopy and attenuated total reflection FT-IR (ATR-FT-IR). Laminate ER samples were irradiated in air up to 100 kGy and then up to 1000 kGy with the dosage rate of 10 kGy / h by using a ^60Co gamma-source. The sample surface was corona charged and the charge distribution was measured by the electro-voltmeter. Obtained results show that both the max charge density and total charge decrease with the total dose of irradiation increasing. It is proposed that trap density as well as trap depth on ER surface is varied by the radiation induced cross-linking and degradation reactions, as a consequence of which the capacity of storing charges of the surface is reduced.
参考文献
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