低本底液体闪烁计数法测量环境样品中^(90)Sr  

Direct Determination ot 90~Sr in Environmental Samples by Ultra Low-Level Liquid Scintillation Counting

作　　者：朱重德 

机构地区：[1]上海市辐射环境监理所,上海200065

出　　处：《上海环境科学》1997年第7期39-41,共3页Shanghai Environmental Sciences

摘　　要：1220Quantulus低本底液体闪烁计数器能区分α谱及β谱。在测量β计数率来计算环境样品中^(90)Sr的活度时,能消除^(226)Ra及其子体的α谱对测量的干扰;根据^(226)Ra及其子体的α计数率与β计数率的比值是恒定的,可以按其α计数率来扣除其β计数率的贡献。方法省略从样品中分离^(226)Ra的步骤,简化操作程序。1220 Quantulus ultra low-level liquid scintillation counter can distinguish αspectrum from β spectrum. The interference of αspectrum produced by 226Ra and its daughters can be eliminated. The ratio of α to β particles emitted by radium and its daughter is constant. Based on the α counting, the contribution of β particles of radium's daughters can be deducted when calculating the activity of 90Sr in environmental samples. Thus, the operating steps can be simplified without separating 226Ra from the samples.

关 键 词：低本底 液体闪烁计数法 锶 镭 环境监测 放射性 

分 类 号：X837.02[环境科学与工程—环境工程]