中子背散射探测技术主要是利用地雷中含氢比例高于周围干燥土壤环境的平均值进行检测。实验环境为有一定含水量(1%～10%)的沙土,地雷埋藏深度分别为2、7、12cm。中子能量为2.5MeV,各向同性,实验中可以使用中子发生器或252Cf作为中子源。探测器采用3He计数器,放置在源的同侧。为了增加朝向地面的中子通量,通常在源的上方放置反射层。我们选取两种典型的地雷模型作为研究对象,一种是直径30cm、厚度9cm的反坦克地雷 Neutron backscattering detection technology is mainly the use of landmine hydrogen content higher than the average dry soil environment around the detection. The experimental environment is sandy soil with a certain water content (1% ~ 10%), and the buried depths of mines are 2, 7 and 12 cm respectively. Neutron energy of 2.5MeV, isotropic, the experiment can use neutron generator or 252Cf as a neutron source. The detector uses a 3He counter placed on the same side of the source. To increase neutron flux toward the ground, a reflective layer is typically placed over the source. We select two typical landmine models as research objects, one is an anti-tank mine with a diameter of 30cm and a thickness of 9cm