固体镭点源中心点位置校准方法研究

固体镭点源经过几十年的服役,长时间在野外环境使用和运输,其内部结构发生了不同程度的变化或损坏,影响到固体镭点源定值的准确性和用源安全。为了确定固体镭点源中心位置变化,该文通过分析中国源、英国源和前苏联源等三种不同类型固体镭点源内部结构的差异,研发了固体镭点源中心位置校准装置和校准方法,通过该装置对镭点源的校准结果统计发现,中国源和英国源的中心点偏移般不超过2 mm,前苏联源中心点偏移大可达20 mm。

Research of Solid Radium Point Source Center

After decades of service,a long time in the wild using and transporting,solid radium point source internal structure has undergone varying degrees of change or damage,which has an affecting on the accuracy and the safety of solid radium point source.In order to determine the changing of center of the solid radium point source,the paper develops the center of the solid radium point source calibration device and calibration methods by analyzes the differences of internal structure of three different types of solid radium point source：Chinese sources,the United Kingdom source and the former Soviet source.By using the device to calibrate the radium point source calibration,statistical results show that Chinese sources and the center of the British sources generally not more than offset 2 mm,the center of the former Soviet source offset up to 20 mm.