内充气正比计数管系统绝对测量<sup>87</sup>Kr放射性活度浓度

内充气正比计数管系统绝对测量⁸⁷Kr放射性活度浓度

摘要: 本工作研制建立1套气体放射性活度绝对测量装置——内充气正比计数管系统。对该系统的坪特性、本底、死时间、端效应和壁效应等性能进行了测试。在此基础上，采用该系统对放射性气体⁸⁷Kr的放射性活度浓度进行了绝对测量，测得值为40.64（1±0.9％） Bq/mL。

Abstract: A internal gas proportional counting system for absolute measurement of gas radioactivity was established. The performances of the system, such as plateaus, background, deadtime, end effect and wall effect were well tested. Then the activity concentration of ⁸⁷Kr was measured absolutely to be 40.64（1±0.9％） Bq/mL by this equipment.