一种用于大剂量常规监测的玻璃剂量计

A GLASS ROUTINE DOSIMETER USED FOR HIGH-LEVEL DOSE MEASUREMENT

本文报告了一种用于常规辐射加工的商用玻璃剂量计,并研究了不同的剂量、剂量率、温度、湿度以及厚度和光照对^(60)Coγ辐射吸收剂量响应的影响。该剂量计量程为0.2-40KGy,其中3-40KGy范围内精度为±3％,在0.06-2.4KGy·h^(-1)范围内,其响应与剂量率无关。在50℃以下没有发现响应有明显的温度依赖性。在湿度上从比较干燥开始直至浸水中辐照未见湿度依赖性,在1000W碘钨灯直射下也未见响应有明显的差异。该剂量计价廉、易得、操作方便,可作为辐射加工领域的剂量质量控制的常规剂量计。

Commercially available glass was tested as a routine dosimeter in terms of the response to ^(60)Co-γ radiation at various doses, dose rates, temperatures, relative humidities and thicknesses, light, as might be encountered in typical radiation processing environments. The linear response range was found to be approximately 200Gy to 40kGy, with no appreciablc rate dependence over dose rates from 60Gy/h to 2400Gy/h, no appreciable temperature dependence below 50℃ and no appreciable relative humidity dependence from the conditions to the moist conditions (in water). The reproducibility of dose assessment for dosimeters selected randomly from several batches is about ±3％.