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为了估计聚变中子产额Cu活化测量法中加速器中子源刻度与实际测量中几何条件不一致对测量结果的影响,通过对MCNP进行二次开发,用蒙特卡罗方法计算了这两种情况下有角关联的γ γ符合探测效率,通过与刻度实验结果比较,验证了计算结果的正确性,得出了几何条件的差别引起探测效率的增加小于3%的结论。
In order to estimate the influence of the neutron source scale of accelerator neutron source on the measurement results due to the inconsistency of geometry conditions in the accelerator Cu neutron yield measurement method and the Monte Carlo method The γγcorresponding to the angular correlation is in agreement with the detection efficiency. The accuracy of the calculation results is verified by comparison with the experimental results. The conclusion is drawn that the difference of the geometric conditions causes the detection efficiency to increase less than 3%.