模拟裂变中子源能谱测量

ENERGY SPECTRUM MEASUREMENT OF A MOCK FISSION NEUTRON SOURCE

一、引言在研究链式反应系统的各种性质时,常常用到具有类似裂变中子能谱的中子源。模拟裂变中子源主要由^(210)Po的α粒子轰击F,Be,Li,B等轻元素产生中子,随着靶元素成份以及结构的差异,中子能谱也不完全相同。应本院同位素处的要求,我们测量了一模拟裂变中子源的能谱,其源强约10~4n/s,靶成份为天然Li 24.16%,F66.14%,B 9.4%,

The energy spectrum of a mock fission neutron source-----Po-α-(Be+B+F+Li)----was measured with a recoil proton pulse height spectrometer. The measu-red spectrum was compared with the spectrum of another mock fission neutronsource. The difference was discussed.