两种LiF(Mg,Cu,P)片状探测器剂量学特性的比较研究

ＧＲ－２００Ａ与ＭＣＰ－Ｎ均为ＬｉＦ（Ｍｇ，Ｃｕ，Ｐ）片状探测器，现将ＧＲ－２００Ａ和ＭＣＰ－Ｎ在发光曲线，灵敏度，重复使用，抗潮湿性能，本底，探测阈，光敏等性能进行平行对比实验，其中ＧＲ－２００Ａ的灵敏度为ＭＣＰ－Ｎ的１．６倍；６次重复使用的结果ＧＲ－２００Ａ灵敏度无变化 ，ＭＣＰ－Ｎ灵敏度下降了２．６％，抗潮湿性能ＧＲ－２００Ａ更优于ＭＣＰ－Ｎ。

Comparative Study of Main Dosimetric Characteristics Between the GR-200A and MCP-N LiF(Mg,Cu,P) TLD Chips

GR 200A and MCP N are the same kind of LiF(Mg, Cu, P) chip detectors. The main dosimetric characteristics of two LiF (Mg, Cu, P) chip TLDs (GR 200A made in Solid Dosimetric Detector & Method Laboratory, Beijing, and MCP N made in Poland) are compared, including glow curve structure, TL sensitivity, anti moisture, reproducibility, background, detection threshold and photosensitivity. Sensitivity of GR 200a is 1 6 times as much as that of MCP N. The sensitivity of GR 200A is stable after being used for six times, but the sensitivity of MCP N dropped 2 8%, and its colour turned from white into light brown. The sensitivity and colour of GR 200A didnt vary after being stored for 25 days at 98% RH, by comparison the sensitivity of MCP N dropped 14%, and its colour turned into light brown. It was found that the GR 200A TLD is for superior to the MCP N TLD in above mentioned characteristics.