中文摘要：

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。

英文摘要：

The large space neutron irradiation platform in Xi ’an Pulsed Reactor was built in 2010 .The designed parameters ,measurement method and experimental result of radiation field of the experiment platform were introduced in the paper .With a prior spectrum calculated by Monte-Carlo method , the neutron spectra of the experiment platform were measured by using multiple-foil activation technique ,and unfolded with genetic algorithm （GA ） . The unfolding result of GA is in accordance well with the result of SAND-Ⅱ method ,and the validity of GA was proved .γ-ray absorbed dose rate was measured by using thermoluminescent dosimeters . The results show that the radiation field parameter of the experiment platform meets the design requirement .