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本文介绍了γ全景参考辐射场中剂量分布和散射分布的蒙特卡罗模拟方法和模拟结果。模拟计算采用MCNP4C程序进行,该程序的精度高,尤其对放射性剂量的计算,被公认为是当前所有剂量计算程序中最精确的一种。该研究有利于在不具备实验条件的情况下解决光子辐射场的参考值定值问题。另外,参考辐射中散射情况的研究对全景结构参考辐射场的设计建造具有重要的指导作用。
In this paper, the Monte Carlo simulation methods and simulation results of dose distribution and scattering distribution in the gamma panoramic reference radiation field are introduced. The simulation is carried out using the MCNP4C program, which is highly accurate, especially for the calculation of radioactive doses, and is recognized as the most accurate of all current dose calculation programs. The research is helpful to solve the problem of setting the reference value of photon radiation field without the experimental conditions. In addition, the research on scattering in reference radiation plays an important guiding role in the design and construction of reference radiation field in panoramic structure.