Al2O3:C光致荧光剂量计初步研究

Preliminary Study on Al2O3:C Optically Stimulated Luminescence Dosimeter

采用液体成膜法制备了Al2O3:C光致荧光剂量计(OSLD),开展了剂量学性能的初步研究。退火后本底为0.03 mGy,均匀性优于2%,在0.02 mGy~10 Gy测量范围内具有良好线性响应,线性相关系数R 2=0.9996,对β、γ射线响应系数差异约10%,对中子响应系数约为β、γ射线的4%~7%,剂量计多次测量响应信号无明显衰减,照后两个月响应变化为5%,可用于一定周期内剂量存档、复测。上述结果表明,液体成膜方法制备的OSLD具有良好的剂量学性能,证明该方法可行。

Al2O3:C optically stimulated luminescence dosimeter(OSLD)was prepared by liquid film forming method,and its dosimetric properties were studied.The results showed that the background was 0.03 mGy after annealing,the uniformity was better than 2%,and it had linear response with correlation coefficient R 2=0.9996 in the measurement range of 0.02 mGy-10 Gy,the difference between the response coefficients ofβandγray was about 10%,the response coefficient of neutron was about 4%-7%ofβandγrays,the response signal of dosimeter had no obvious attenuation after multiple measurements,and the response changed by 5%in two months after exposure,which can be used for dose archiving and retesting in a certain period.The results show that the OSLD prepared by the liquid film forming method has good dosimetric properties,which prove the feasibility of the method.