本工作测量了 Ta 和 In 在0.34—1.68MeV 能区的中子俘获截面。实验中使用大液体闪烁探测器测量瞬发俘获γ辐射,用长中子计数器监测中子通量。为了降低测量中的本底采用了快符合电路和飞行时间技术。截面测量为相对测量,以金的俘获截面作为标准。最后对结果进行了比较和讨论。 This work measured the neutron capture cross section of Ta and In in the 0.34-1.68 MeV energy region. In the experiment, large liquid scintillation detector was used to measure the instantaneous capture of gamma radiation and the neutron flux was monitored by a long neutron counter. In order to reduce the background of the measurement using fast circuit and time of flight technology. Cross-section measurements are relative measurements with gold capture sections as standard. Finally, the results were compared and discussed.