The error source in measuring neutron fluence rate is gived . the efficiency of u - fission chamber is studied . the effect factors to detector are analyzed and experimentally studied 开展了铀裂变室探测器效率的研究，对影响探测器对期望中子或非期望中子探测的各种因素进行了分析和实验研究。
2.
The effect of detector disturb and the shell of the detector and construction material is not distinct . the low absorb cross section material is used to 235u - fission chamber . the low z material is used in experimental bracket and shielding material and the material is used less 获得了探测器之间扰动、探测器外壳、支架材料对信号中子测量无明显影响的结果；对~ ( 235 ) u裂变电离室，需采用中子吸收截面低的材料，对实验装置的支撑材料和屏蔽材料宜选用低z材料且尽量减少用材。
