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用多箔活化法测定铀氢锆脉冲堆辐照腔脉冲工况下的中子注量 ,选用了 2 1种非裂变箔。其中 5种是热区的 ,5种是中能区的 ,1 1种是快区的 ,给出了箔的特性参数。通过测定各箔的活化率 ,运用迭代法中的直接偏差最小法和应用较广的SAND Ⅱ ,求解了辐照腔待测点全能区 (1 0 -4 eV～ 1 8MeV)微分和积分中子注量谱。用求解的微分中子注量计算了 0 5MeV和 1MeV以上的阈探测器的平均截面 ,研究了影响求解精度的主要因素
The multi-foil activation method was used to measure the neutron flux under the pulsed irradiation of uranyl zirconium-zirconium (HF) pulsed stack. Two kinds of non-fissile foils were selected. Five of them are hot zones, five are middle energy zones and 11 are fast zones, giving the foil’s characteristic parameters. By measuring the activation rate of each foil, using the direct deviation method in iteration method and the widely used SAND Ⅱ, the differential and integral neutron (10 4 eV ~ 18 MeV) Fluorescence spectrum. The average cross sections of threshold detectors above 0 5 MeV and 1 MeV were calculated by using the solved differential neutron fluence. The main factors affecting the accuracy of the solution were studied