典型几何热中子计数器效率研究

On the detection efficiencies of thermal neutron counters with typical shapes

常用的热中子正比计数器,主要是基于~3He(n,p)T和^(10)B(n,α)~7Li反应。由于反应截面大,Q值适当,所构成的计数器具有信号获取简单、探测效率高等优点。本工作对三种典型几何计数器的的探测效率和谱修正系数进行了计算,并与实验结果作了比较。

The detection efficiencies of thermal neutron counters with three typical shapes (parallel-plate, spheric and cylindric) and the correction coefficients for Maxwellian spectra are calculated. The experimental results are obtained and a comparison with the calculation is made.