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4 - gao ya dian li shi
Author(s): 
Pages: 55-59+74
Year: Issue:  5
Journal: Radiation Protection

Keyword:  高压电离室电离电流本底电流测量精度大气压饱和特性工作电压放射性样品绝对测量衰变率;
Abstract: <正> 一、引言 通常用直接测量核素衰变率来测定放射性样品活度时,样品需经特殊制备,并须作一系列复杂的修正,对不同核素,测量方法还各不相同;精确测量衰变率往往需要好几天时间。4π-γ电离室既能保持较高的测量精度,又能提高测量速度,它具有如下优点: (1)测量精度较高,被广泛用作传递γ核素标准的仪器。
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