RESEARCH STUDY ON RESONANCE NEUTRON TOMOGRAPHY USING LINAC TIME OF FLIGHT TECHNIQUE

用直线加速器和飞行时间技术验证了共振中子层析成像的思想，并用一维位置灵敏He-3气体正比计数器和双参数64K PHA系统对穿过样品的中子进行了计数。利用该系统成功地获得了钴箔和金箔的X射线照相数据，其中利用132 eV(Co)和4.91 eV(Au)的各自共振能量的差异清楚地区分了这两种元素。考虑到试件本身的中子散射效应，目前航天器分辨函数的标准偏差实际为1.5厘米。

The idea of resonance neutron tomography has been examined using the LINAC ＆ time of flight technique for the resonance neutron beam production, and the transmitted neutrons through the sample specimen have been counted by the one dimensional position sensitive He-3 gas proportional counter and two parameter 64K PHA system.The radiography data of Cobalt and Gold foils have been successfully obtained using this system, where the two elements have been clearly distinguished using the difference of each resonance energy of 132 eV (Co) and 4.91 eV (Au). The present standard deviation value of the spaciel resolution function has been practically obtained as 1.5 cm including the neutron scattering effect by the specimen itself.