热中子场是国际标准组织ISO-8529文件推荐的重要中子参考辐射场之一。中国原子能科学研究院重水反应堆热柱提供了很好的热中子源,通过对下列指标的测量,本工作在这个热柱上建立了热中子参考辐射场。中子能谱　利用飞行时间法,用机械选择器进行了测量。选择器是一个高速旋转的圆 The thermal neutron field is one of the important neutron reference radiation fields recommended by the International Organization for Standardization ISO-8529. The thermal column of heavy water reactor of China Institute of Atomic Energy provided a good source of thermal neutron. By measuring the following indicators, this work established a thermal neutron reference radiation field on this thermal column. Neutron energy spectrum using time of flight method, the mechanical selector was measured. The selector is a high-speed rotating circle