某护膝护腰产品中放射性活度浓度的测量与分析

目的 测量某批次放射性异常的护膝和护腰样品中放射性活度浓度。方法 通过无源效率刻度方法对HPGe γ谱仪进行效率刻度，测量某护膝护腰样品中放射性核素的活度浓度。结果 该类型护腰样品中放射性核素²³⁸U、²²⁶Ra和²³²Th的活度浓度分别为（409±30）、（137±10）和（1 634±122） Bq/kg，而护膝样品中²³⁸U、²²⁶Ra和²³²Th的活度浓度分别为（770±56）、（283±22）、（3 106±230） Bq/kg。结论 该批次产品中放射性核素的活度浓度相对较高，且护膝样品高于护腰样品，对人体存在潜在的外照射影响，应引起重视。

Measurement and analysis of the radioactivity concentration of in a kneepad and a waist support

Objective To measure the radioactivity concentration of in the kneepad and waist support samples with abnormally high gamma radiation. Methods The γ-spectrometer was calibrated by the method of sourceless efficiency calibration, and the concentration of radionuclides in the knee pad and the waist support were measured. Results The concentrations of the waist support were 409±30 Bq/kg、137±10 Bq/kg and 1 634±122 Bq/kg for the ²³⁸U, ²²⁶Ra and ²³²Th, respectively. While the concentrations of ²³⁸U, ²²⁶Ra and ²³²Th in the knee pad were 770±56 Bq/kg、283±22 Bq/kg and 3 106±230 Bq/kg, respectively. Conclusion The concentrations of radionuclides in both the kneepad and waist support were relatively high. It exists a potential external exposure to human body, and more attentions should be paid.