在快中子辐射俘获反应研究中,反符合屏蔽高能γ,谱仪的主探测器和符合环探测器的计数率常高达10~5～10~6S~(-*),在这样高的计数率条件下,光电管增益稳定和堆积脉冲的剔除是保证实验正常进行的关键。一般的电阻分压方式,即使采用大电流(≥2 mA)也 In fast neutron radiation capture reaction studies, anti-coincidence shielded high-energy gamma spectrometer main detector and coincidence detector ring count rate often up to 10 ~ 5 ~ 10 ~ 6S ~ (- *), in such a high count Rate conditions, the stability of the phototransistor and accumulation of pulse rejection is to ensure the normal operation of the key. The general resistance voltage divider, even with high current (≥ 2 mA) also