过滤X射线参考辐射场特性的蒙特卡罗模拟研究及实验验证

• 作 者: 徐阳 高飞 宋明哲 倪宁
• 机 构: 计量测试部,
• 出 处: 中国原子能科学研究院年报
• 发表日期: 2016年00期
• 关键词: X射线 辐射场 辐射质 蒙特卡罗模拟 散射辐射 注量 计量测试 参考辐射 剂量仪 栅元

利用蒙特卡罗方法对中国原子能科学研究院计量测试部过滤X射线参考辐射的X光机韧致辐射初始谱、经过滤后的注量谱及辐射场均匀性和散射辐射进行模拟,并利用标准剂量仪进行实验测量验证。在X射线能谱的模拟中,从电子打靶阶段开始,利用栅元计数卡F4得到不同管电压下原级X射线注量谱,如图1所示。随后,加入ISO4037-1中规定的W-150、L-210两种辐射质所对应附加过滤,得到过滤X射线谱,并与德国PTB实验室所给出

Monte Carlo method was used to simulate the bremsstrahlung initial spectrum of x-ray machine filtered by x-ray reference radiation, the fluency spectrum after filtration, the uniformity of the radiation field and the scattered radiation of the X-ray reference radiation by the China Meteorological Administration, Dosimeter for experimental measurement validation. In the simulation of X-ray energy spectrum, the primary X-ray fluence spectra at different tube voltages were obtained using the cell counting card F4, starting from the electron-targeting stage, as shown in FIG. 1. Subsequently, the addition of ISO4037-1 in the W-150, L-210 two kinds of radiation corresponding additional filtering, filtered X-ray spectra, and with the German PTB laboratory given