【摘要】 研究了一种可同时测量环境大气中痕量放射性氙的新方法 :β γ能谱符合法。利用不同能量窗域的 β射线脉冲或内转换电子作为门控信号 ,和与之相应的γ射线能谱或特征X射线能谱相符合 ,可同时高灵敏度地测量环境大气中133Xe、133Xem 和135Xe等氙核的放射性活度。测量本底较常规方法降低了 3～ 4个量级。更多还原

【Abstract】 Based on the coincidence of the β pulse or internal conversion electron in different energy window as a gate signal with their related γ ray or characteristic X ray, a new method are studied in order to determine simultaneously interested radioxenon in ambient air. The background count with this method is 3～4 orders of magnitude lower than that with normal γ spectrometer method, and the optimal detection limit with a order of mBq/m 3 can be reached.更多还原