目前国内外在快中子辐射育种、中子治癌、辐射化学、材料损伤探测和中子屏蔽等方面的研究已取得可喜的进展。这些工作都需要准确知道辐照中子源的总产额及辐照体内不同深度的中子注量及能量。对于加速器中子产额的测量,最准确的方法是伴随粒子法,精度可达±1%,其次是闪 At home and abroad, the research on fast neutron radiation breeding, neutron cancer treatment, radiation chemistry, material damage detection and neutron shielding has made gratifying progress. All these work needs to know accurately the total output of irradiated neutron sources and the neutron fluence and energy of different depths in vivo. For the accelerator neutron yield measurement, the most accurate method is accompanied by the particle method, the accuracy of ± 1%, followed by the flash