次模拟裂变中子源能谱测量

ENERGY SPECTRUM MEASUREMENT OF SUB-MOCK FISSION NEUTRON SOURCES

摘要: <正> 一、引言次模拟和模拟裂变中子源用于研究链式反应系统的各种性质,所以这些中子源的能谱测量是很重要的。源材料、源包壳材料和工艺过程不同,中子源能谱也不同,因而在制作过程中,对源中子能谱的监测是十分必要的。这些中子源的能量一般是几百keV,这一能区连续中子能谱测量一直是很困难的。中子飞行时间法不适于本工作;阈探测器活化法在

Abstract: The energy spectra of three sub-mock fission neutron sources were measuredwith a methane gas proportional counter. The measured energy spectrum of thePo-α-Li neutron source was compared with the existing measured and calculatedspectra. A good agreement was found.