CAJ | 학술논문

冷中子照相利用穿透样品的中子和荧光屏~6Li反应产生的α带电粒子与荧光材料发光,从而在探测器上记录光强度的分布.本文简单介绍了冷中子照相的特点,给出了铍与钛金属宏观总截面随能量的变化,设计特定的样品采用MCNP模拟不同能量下的中子图像,中子图像显现Bragg吸收限上下两幅图像的对比度差异,采用差分成像对两幅中子图像进行处理,凸现了冷中子照相的优点.
랭중자조상이용천투양품적중자화형광병~6Li반응산생적α대전입자여형광재료발광,종이재탐측기상기록광강도적분포.본문간단개소료랭중자조상적특점,급출료피여태금속굉관총절면수능량적변화,설계특정적양품채용MCNP모의불동능량하적중자도상,중자도상현현Bragg흡수한상하량폭도상적대비도차이,채용차분성상대량폭중자도상진행처리,철현료랭중자조상적우점.
Cold neutron radiography lies in that neutrons react with ~6Li nucleus in the scintillator to pro-duee charged alpha particles, which interact with fluorescent material and yield photons; hence the pho-tons distribution is recorded by detector. The paper introduces briefly the character of cold neutron radio-graphy, gives the macroscopic total section with different neutron energy, and simulates neutron images of different energy by MC, which indicates the contrast difference below and above Bragg cut-off, proces-ses the neutron images by difference imaging, which shows the advantages of the cold neutron radio-graphy.