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

利用直线加速器和飞行时间技术产生共振中子束，验证了共振中子层析成像的思想，并利用一维位置灵敏He-3气体正比计数器和双参数64 K PHA系统对穿过样品的透射中子进行了计数，成功地获得了钴箔和金箔的射线照相数据。其中使用132 eV（Co）和4.91 eV（Au）的每个共振能量的差已经清楚地区分了两种元素。目前的空间分辨函数的标准偏差值，实际上是1.5cm，其中包括了样品本身的中子散射效应。

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.