【摘要】 为解决目前在用的α、β平面放射源活度计量检定和校准问题,保障α、β污染检测仪的量值准确性,对2πα、2πβ粒子发射率副基准装置进行深入研究,更新前置放大器、主放大器,研制大面积的流气正比计数装置和高速计数器,提高整个系统装置的分辨时间,拓展测量范围。该系统首次采用实时数据处理技术去除异常数据,提高测量结果的重复性,减小测量结果的不确定度。实验结果表明:整体装置系统稳定,测量过程实现自动化,优化数据处理、不确定度计算评估,为国内计量部门、专业实验室提供量值溯源和检测服务。更多还原

【Abstract】 In order to solve verification and calibration problems of the α and β plane source activity to ensure the accuracy of α and β contamination testing equipment,Vice primary national standard of α and β emission rate in 2π sr is researched deeply. Preamplifier and main amplifier are updated. The large area gas-flow proportional counter and high-speed counter are developed to improve time resolution of the whole system devices and expand the range of measurement. Realtime data processing techniques to remove the abnormal data is firstly used in the testing system software to improve the reproducibility of the measurement results and reduce measurement uncertainty. The whole device system is stable to automate data collection and optimize data processing and uncertainty assessment. It is used to provide traceability and testing services for domestic metrology departments and professional laboratories更多还原