摘要
本文描述了一种利用中子照相进行定量分析的方法,介绍了该方法的基本原理,并应用粒子输运程序MCNP模拟分析样品内部散射中子随样品与探测器之间距离变化对中子成像的影响。为削弱散射中子对中子透射成像图像信息的影响,对穿透样品的厚度进行了定量分析。
A quantitative analysis method of neutron radiography is introduced in the paper. The principle of this method is described, and the influence of scattered neutrons on neutron radiography is analyzed using the particle transport programme MCNP. The relationship between the specimen-detector distance and scattered neutrons is also discussed. To weaken the influence of scattered neutrons, the penetrating thickness of thermal neutrons is quantitatively scaled by analyzing neutron pictures in which internal scattered neutrons have trailed off.
出处
《核技术》
CAS
CSCD
北大核心
2007年第4期273-276,共4页
Nuclear Techniques
关键词
中子照相
∑标定方法
宏观截面
MCNP程序
Neutron radiography, ∑-scaling, Macroscopic cross-section, MCNP programme
