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西安脉冲堆于2010年建成了大空间中子辐照实验平台。本文介绍了该实验平台辐射场设计参数、辐射场测量方法和实测结果。采用蒙特卡罗方法计算了实验平台内中子初始谱。利用多箔活化法测量了中子能谱,解谱方法采用遗传算法,并与SAND-Ⅱ解谱方法进行了对比,对比结果较为一致,证明了遗传算法解谱的有效性。应用热释光剂量计测量了γ射线吸收剂量率。测量结果表明,该实验平台辐射场参数符合设计要求。
Xi’an pulse reactor in 2010 built a large space neutron irradiation experimental platform. This paper introduces the design parameters of the radiation field of the experimental platform, radiation field measurement methods and measured results. The Monte Carlo method was used to calculate the initial spectrum of neutron in the experimental platform. The neutron energy spectrum was measured by the multi-foil activation method. The solution method was genetic algorithm and compared with the SAND-Ⅱ method. The results of the comparison were consistent and proved the effectiveness of the genetic algorithm. The γ-ray absorption dose rate was measured using a thermoluminescence dosimeter. The measurement results show that the experimental parameters of the radiation field meet the design requirements.