国产琥珀色有机玻璃剂量计性能的研究

RESEARCHES OF AMBER PMMA DOSIMETER

我们研制的琥珀色有机玻璃片是在1—50kGy 剂量范围内、γ辐射加工中使用的一种剂量计材料,辐射诱发的603、651nm 吸收峰和640nm 波谷可作为读数波长。辐照时的温度和剂量计片的吸水量是剂量计辐射响应的主要影响因素。辐照后剂量计片的吸光度随放置时间延长而非线性变化,其变化速度与读数波长、放置温度,吸收剂量和剂量计片吸水量等因素有关。在全量程范围内剂量测量值精密度优于4%,总不确定度估计为±8%。

A self-made amber PMMA was used as a dosimetermaterial for practial measurements in 1 to 50 kGy radiation-processingdose range.The absorbance of the material induced by radiation isdetermined at 603 and 651 nm,or 640 nm.The relationship betweenabsorbance and dose was non-linear.Of the factors which couldinfluence the radiation response characteristics of material,absorbedwater and temperature during irradiation were shown.to be primary.The time-dependence of specific absorbance was non-linear and dependedon...