摘要
在γ共振测浓度深度分布的实验中,对应一个入射能量所测到的γ计数应当分成两部分:一部分是共振计数,它正比于发生共振处的靶核浓度;另一部分是非共振计数,它与入射粒子所碰到的全部靶核有关。不能只依据共振截面是非共振截面的若干倍,就忽略非共振计数,还要看靶厚能耗是共振宽度的多少倍。有时,非共振计数在总计数中占有相当大一部分,必须谨慎对待。
The gamma counts, detected corresponding to an incident energy, consist oftwo parts in general. One comes from the region of resonant reaction. It isproportional to the concentration of the nucleus of the target in the resonantregion. The other comes from all the nuclei met by the incident particles in itspath except thoes nucleus of the resonant reaction region, that is non-resonantcount. It is related to the non-resonant cross sections and the target thickness.The non-resonant counts sometimes, account for a large proportion of totalgamma counts. But it has not been taken in to account in the references publishedup to now.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1990年第4期86-89,共4页
Atomic Energy Science and Technology
关键词
共振
测量
非共振
计数
Gamma resonance
Distribution of concentration depth
Nonresonance counts
