140 keV质子辐照对石英玻璃光谱性能影响的研究

研究了JGS3 光学石英玻璃在真空、冷黑和能量为 14 0keV的质子辐照下光学透过率变化的基本规律。在辐照剂量大于 5× 10 14 proton/cm2 后 ,主要引起 2 30～ 2 5 0nm的吸收带 ,其吸收峰值随辐照剂量的增加而单调增加。在较大辐照剂量下 ,近紫外和可见区域也存在某些弱的吸收带。 2 30～ 2 5 0nm的吸收带由E′心引起。质子辐照下在JGS3 光学石英玻璃中形成的E′心是受氢扰动的 ,即辐照过程中不仅发生Si -O键的断裂 ,而且发生≡Si- ]和 ≡Si-O]向 ≡Si-H]和 ≡Si-OH]的转变

A Study on Effects of Proton Radiation with 140 keV on Spectrum Property of Quartz Glass

Under the environment of vacuum and cold black, the change in optical transmittance of JGS 3 optical quartz glass induced by radiation of protons with 140 keV was studied. When the radiation fluence exceeds 5×10 14 protons/cm 2, an absorption band in the wavelength range of 230～250 nm appeared and its peak increased with increasing the radiation fluences monotonously. Under higher radiation fluences, weaker absorption bands existed in the near ultraviolet and visible region. The color center E′ is responsible for the 230～250 nm absorption band. The E′ color center induced by proton radiation in the optical quartz glass is disturbed by hydrogen. During the radiation not only the breaking of Si-O bonds but also the transition from the and radicals into the and would occur.