摘要
建立了由聚乙烯、铅和CR-39组成的叠层探测器探测各向同性中子能谱模型,计算了叠层探测器对各向同性中子的能量响应以及叠层探测器的能量分辨率。计算结果表明,叠层探测器的响应和能量分辨率与中子能量、聚乙烯以及铅衰减层厚度有关。聚乙烯厚度不变,响应峰值和能量分辨率随铅的厚度增加而变小;铅的厚度不变,响应峰值和能量分辨率随聚乙烯厚度增加而变大,且响应函数形状改变。
The isotropic neutron response and energy resolution of the combined detector, which consists of polyethylene, lead and CR-39, are calculated. The calculated results show that both energy response and resolution of the detector are related to neutron energy and the thicknesses of both polyethylene and Pb. For a fixed thickness of polyethylene, the peak value of energy response and energy resolution turn to smaller with the increase of Pb thickness. For the fixed thickness of Pb, with the increase of thickness of polyethylene, the peak value and resolution turn to larger, the peak value position moves towards the high neutron energy and its shape also changes.
出处
《核技术》
EI
CAS
CSCD
北大核心
2005年第9期704-706,共3页
Nuclear Techniques
基金
国家重点基础研究973项目(G19990226)资助
