期刊论文

Wu, J.-J.

中文

核电子学与探测技术

0258-0934

2016

36

1

68-72

10.3969/j.issn.0258-0934.2016.01.017

201210003:公益性行业科研专项 25－AKY1307:中国计量科学研究院基本科研业务费专项

本校为第一机构

为了推进X射线空气比释动能基准量值传递工作的开展,建立了（20-300）kV X射线参考辐射装置。距离X光管焦点1 m的均匀野处,建立了CCRI会议推荐的两组低能X射线参考辐射质50kV（a）和50 kV（b）,采用拟合方法测量得到的半值层、同质系数与推荐值相差2%以内。通过蒙卡模拟软件EGSnrc研究两组参考辐射质的能谱分布情况,并计算了其平均能量,分别为33.3和28.1 keV。

For promoting the work that the air-kerma primary standard value be transferred, the reference radiation device is established in the range of (20-300) kV X-rays. Two low-energy reference radiation qualities 50 kV (a) and 50 kV (b) recommend by CCRI are established on the uniform radiation field. The distance from the source to the reference plane is 1 m. Half-value layer and homogeneity coefficient are measured by the fitting method. The difference with the recommended values is within 2%. Their spectrum distribution can be got by Monte Carlo ...