【摘要】 本文介绍了本实验室研制的JR型晶溶发光剂量测量仪的结构、性能及其应用。仪器包括光读出探头、电流转换电路和读数记录系统。仪器可测10^-10—10^-7A电流。八小时内读取¹⁴C光源产生的48个读数,其测量值的相对标准偏差低于0.4％。讨论了所用GDB-52型光电倍增管信噪比随环境温度的变化。给出了两种转换电路（V-f,I-f）的线性与稳定性的测定结果。应用此仪器配合谷氨酰胺剂量计测定了花兰式钴源[7.4×10¹⁴Bq（2×10⁴Ci）]的中心剂量率,其与用丙氨酸/ESR剂量计和染色聚乙烯薄膜剂量计测量结果的相对偏差均不大于3％。更多还原

【Abstract】 Structure, performance and applications of the lyolumines-cence dosimeter （model JR） developed in our laboratory were described inthis paper.The dosimeter consists of readers, current converters and signalrecorder system.The dosimeter can measure current of 10^-10-10^-7A.48 data from the photomultiplier due to the exposure of ¹⁴C light sourcewere obtained within 8 hours,and the relative standard deviation was lessthan 0.4%. Changes of ratio of signal to noise of photomultiplier corres-ponding to changes in environmental temperature were discussed. Measure-ment results of linearity and stability of both V-f and I-f converters weregiven. The dosimeters were used to measure dose rate in center of ⁶⁰Cosource [7.4×10¹⁴ Bq （2×10⁴ Ci）]constructed like cylinder.Measurementresults by the dosimeters was compared with those by alanine ESRdosimeters and PE-MG dosimeters,and the relative deviation was less than3%.更多还原