我们在用脉冲调制~3T(d,n)~4He的14兆电子伏中子源进行缓发中子测铀井的室内模拟试验中,采用塑料闪烁体记录~(16)O(n,p)~(16)N(T~1/2=7.13秒)β-~(16)O·γO~(16)反应产生的γ射线(Eγ约7.12和6.13兆电子伏)来监视中子源产额。塑料闪烁体因受到14兆电子伏中子的(n,Xγ)反应产生的强瞬发γ射线的照射,光电倍增管的输出电流波动很大,影响对~(16)O衰变的γ射线的测量。为减小管子输出电流的波动,采用 We used a scintillator to record ~ ​​(16) O (n, p) in a laboratory simulation of a delayed neutron neutron uranium well using a pulsed-3T (d, n) (Eγ about 7.12 and 6.13 MeV) produced by the reaction of β ~ (16) O · γO ~ (16) N to N (T ~ 1/2 = 7.13 sec) amount. The plastic scintillator is exposed to strong transient γ-rays generated by the (n, Xγ) reaction of 14 MeV neutrons. The photomultiplier tube output current fluctuates greatly and affects the γ-ray decay of ~ (16) O measuring. In order to reduce the fluctuation of the tube output current, adopt