【摘要】 为了研究快中子小角散射,研制了一台位置灵敏探测器。这个探测器主要有由观测液体闪烁体的两个光电倍增管组成,光电倍增管两个信号之间的时间差用来确定光产生的位置,用位置灵敏探测器和伴随粒子方法,从3°～15°角范围,测量了14.7MeV中子在Ti、Nb、Zr、Pb上的弹性散射微分截面,用蒙特卡洛方法对通量衰减、多次散射和有限几何进行了修正。实验结果为核工程设计提供了急需的数据。更多还原

【Abstract】 A position-sensitive detector has been developed for studying small angle scattering of fast neutron. The detector mainly consists of two photomultiplier tubes to monitor the liquid scintillator. The time difference between two signals from two photomultiplier tubes is used to determine the position of light emitted. The 14. 7 MeV neutron elastic scattering differential cross section of Zr, Nb, Ti and Pb were measured by position-sensitive detector and associated particle time-of-flight method at the angles from 3?to 15? The corrections for neutron fluence attenuation, multiple scattering and finite geometry are performed by using Monte-Carlo method. The experimental results provide data needed in nuclear engineering design.更多还原