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.
出处
《上海环境科学》
CAS
CSCD
1997年第7期39-41,共3页
Shanghai Environmental Sciences
关键词
低本底
液体闪烁计数法
锶
镭
环境监测
放射性
Ultra low-level liquid scintillation counting Strontium Radium Spectrum Counting rate Environmental radio analysis
