【摘要】 本文介绍了固体样品中总α、总β放射性水平测定的方法,包括同时测定样品总α、总β时制样的最佳厚度及实际样品测定时的变异系数。研究结果表明,LB770十路低本底α、β测量仪,其样品盘的直径为45 mm时,测定最佳质量厚度为10 mg/cm2;测定实际样品时,总α放射性活度浓度变异系数为5.4%～11.4%,总β放射性活度浓度变异系数为2.8%～10.3%。采用本方法于2003年参加了国家环保总局辐射环境监测技术中心组织的茶叶灰中总α、总β测量比对,比对结果显示,测量值与参考值符合较好。更多还原

【Abstract】 The measuring method of gross α,gross β in solid is introduced in this paper,which covers the best thickness of the sample and variation coefficient of radioactivity concentration of the samples.The results show that using sample tray with diameter 45 mm,the optimized mass thickness is 10 mg/cm2.For the actual sample measurement,the variation coefficient of radioactivity concentration of gross α in solid is 5.4%～11.4%,and gross β is about 2.8%～10.3%.Inter-lab comparative analysis of gross α and gross β in tea ash implies that the procedure work well.更多还原