^(133)Xe气体放射性浓度的绝对测定

Absolute measurement of radioactive gas concentration of ^(133)Xe

本文描述了133Xe放射性气体源的制备和测量系统,研究了内充气正比计数管绝对测量133Xe放射性活度的方法和技术。扣除放射性杂质后,用长度补偿法确定了参考时刻下所测133Xe源的放射性浓度为42.86(1±0.82%)Bq/mL。

This paper describes the preparation and measurement system about gas radioactive source ^133Xe, and the method and technique of the absolute measurement are discussed. After deducting the radioactivity of impurities, the radioactive concentration of ^133Xe is determined by length-compensated method. The result of measurement for the ^133Xe source is 42.86±0.82% Bq/mL at reference time.