摘要
从中子和γ射线的实际输运过程出发,推导出了一个柱样品的中子注量衰减和γ自吸收修正的统一计算公式.在推导中考虑了这两种效应的位置关联用不同方法对这个公式的计算结果进行了检验,证明这个统一计算公式物理图像清晰,计算速度快,结果可靠,适用于快中子核反应的伴生γ射线截面测量中的数据处理.
A unified formula for calculating the correction values of neutron flux attenuation and gamma ray self-absorption in a large cylidrical sample is deduced from actual transportion process of the neutrons and gamms rays. The checks for this formula are made by means of various methods. It is proved that its physical picture is cleat, its calculation result is reli- able, its calculation speed is fast and it is suitable for data processing in the measurements of associated gamma ray cross sections from the reactions induced by fast neutrons.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
1989年第1期21-26,共6页
Journal of Beijing Normal University(Natural Science)
基金
国家自然科学基金会
核工业部资助项目
关键词
柱样品
中子注量衷减
中子核反应
nuclear reaction, cylindrical sample, neutron fluence attenuation, gammaray self-absorption, gammaray production cross section.
