摘要
设计一个快中子聚乙烯慢化体,用来慢化加速器的d-T和d-D中子,利用^(164)Dy(n,γ)^(165)Dy^m在热中子区极高的反应截面,得到半衰期为75s的^(165)Dy^m,使用HPGe探测器测量^(164)Dy^m放出的γ射线。由于测得的γ射线与加速器的中子产额成一定比例,故通过这种方法可测量脉冲中子源的中子产额。
A polyethylene moderator was designed for moderating d-T and d-D neutrons from neutron generator. The cross-section of ^164Dy（n,γ）^165Dy^m is very large for the thermal neutron, so that lots of ^165Dy^m are produced in the moderator. The half life of ^165Dy^m is 75 s, and it emits ample gamma rays. The gamma rays were measured by HPGe detector. The amount of T-ray is proportional to the neutron yield, hence the yield of pulse neutron source can be measured.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2007年第5期533-536,共4页
Atomic Energy Science and Technology
