三氟化硼(BF_3)正比计数管是应用十分广泛的慢中子探测器之一,1939年可尔夫(Korff)首先制成了这种计数管,后来经过各国有关研究工作者进一步改进和提高,目前可作出阴极直径10厘米的BF_3计数管(充气到一大气压左右),目前,它仍然在继续发展中,BF_3气体正比计数管对于固体和液体的慢中子探测器来说有它的优点:在技术上较简单;生产成本低;使用方便;对γ射线的分辨能力高等,并且可获得较高的探测效率。所以,BF_3正比计数管在探测 BF3 proportional counter tube is one of the most widely used slow neutron detectors. In 1939, Korff firstly made such a counter tube, and then it was further improved by relevant researchers in various countries. , It is currently possible to make a BF_3 counter tube with a cathode diameter of 10 cm (inflated to around atmospheric pressure) and it is still continuing to evolve. The BF_3 gas proportional counter tube has its use for solid and liquid slow neutron detectors Advantages: relatively simple technically; low production cost; easy to use; high resolution to gamma rays and high detection efficiency. Therefore, BF_3 proportional counter in the probe