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

利用直线加速器飞行时间技术进行共振中子断层扫描的研究

• 批准号: 59420049
• 负责人: SEKIGUCHI Akira
• 金额: $ 8.64万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1984
• 资助国家: 日本
• 起止时间: 1984 至 1985
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-59420049/
• 关键词: RESONACE NEUTRON; RADIOGRAPHY; TOMOGRAPHY; LINAC; TIME OF FLIGHT TECHNIQUE; 飛行時間法; 核種同定; 2次元パルス波高分析器; 位置敏感型He-3検出器

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.

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，利用该系统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。