关键词: 
中子探测 /
俘获探测器 /
裂变反应率

摘要: 为了在弱中子场和有限小空间内测量绝对裂变率， 制作了俘获探测器， 研究了俘获探测器的性能。 介绍了用于中子测量的俘获探测器和铅屏蔽室， 以及该探测器系统在特定条件下测量裂变反应率的结果， 并与裂变室测量结果进行了比较。 探讨了铅屏蔽室大小对测量结果的影响。 To detect the absolute neutron flux in a weak neutron field and restricted space， the fission fragment trapping detector was fabricated and the properties of the detector were studied. In this paper， the detector and shielding chamber used in neutron detection were described and the experimental measurements of the fission rate in specific condition were performed with the detection system and the result has been compared with that obtained by fission chamber. The influence of the shielding chamber on the measured results was analyzed.