摘要
透射式γ射线ICT采集系统所获原始数据中 ,包含有Compton散射光子的计数 ,在探测器较少时 ,常采用加后准直器的方法来控制散射光子进入探头 ,但在实时测量的ICT中 ,由于探头数较多 ,加后准直器将受到空间的限制。笔者拟采用让Compton散射光子与透射光子一并进入探测器 ,再从探测器总的计数中将散射光子减除。并建立了透射式ICT康普顿 (Compton)散射针对圆形截面工件的数学模型 ,并给出了相应的修正公式以及散射修正的程序设计原理。
In original data and from acquisition system of γ-ray, TICT contains counts coming from Compton scattering.We control the scattering photons entering detector by using back collimator in less detectors, but this method is restricted by space in real time ICT because of more detectors.This problem can be sloved by allowing Compton scattering photons entering detectors together with useful photons, and removing them from the total counts again.This paper establishes mathematical model of workpiece with rounded section for Compton scattering in TICT,the corresponding equations and design principle of program for correction are presented.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第10期78-80,共3页
Journal of Chongqing University
