磷肥中放射性核素活度浓度简易检测方法研究

Study on Easy Measurement of Radionuclide Specific Activity in Phosphate Fertilizer

推导建立了一种相对简易的磷肥中铀系放射性核素活度浓度检测方法。根据所采用的观测量不同,方法细分为3种。选择第3种方法进行实验测算,利用基于G-M计数管的Inspector Alert放射性探测器,在密闭环境对0.0642 g磷肥样品进行α射线探测,并最终推算得出在最不利情况下,226Ra的活度浓度为0.2293 Bq/g,238U的活度浓度为0.4586 Bq/g。

Deduced and introduced a relative easy method for measurement of uranium-series specific activity in phosphate fertilizer. By using different detections, the method is differentiated in three branches. Experiment was only designed to validate the third method, an INSPECTOR ALERT detector based on G-M tube was used, and the alpha-ray from 0.0642 g phosphate fertilizer sample was detected in the closed condition. After calculating according to the detections obtained, the specific activity of226 Ra is less than 0.2293 Bq/g,and of238 U is less than 0.4586 Bq/g.