| 一个柱样品的中子注量衰减和γ射线自吸收修正的统一计算方法 |
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| 引用本文： | 周宏余,王皖虹,颜一鸣,范国英.一个柱样品的中子注量衰减和γ射线自吸收修正的统一计算方法[J].北京师范大学学报(自然科学版),1989(1). |
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| 作者姓名： | 周宏余 王皖虹 颜一鸣 范国英 |
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| 作者单位： | 北京师范大学低能核物理研究所，北京师范大学低能核物理研究所，北京师范大学低能核物理研究所，北京师范大学低能核物理研究所 |
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| 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.
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| 关 键 词： | 中子核反应 柱样品 中子注量衰减 γ自吸收 γ射线产生截面 |
A UNIFIED METHOD FOR CALCULATING NEUTRON FLUX ATTENUATION AND GAMMA RAY SELFABSORPTION IN A LARGE CYLIDRICAL SAMPLE |
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| Zhou Hongyu Wang Wanhong Yan Yiming Fan Guoying.A UNIFIED METHOD FOR CALCULATING NEUTRON FLUX ATTENUATION AND GAMMA RAY SELFABSORPTION IN A LARGE CYLIDRICAL SAMPLE[J].Journal of Beijing Normal University(Natural Science),1989(1). |
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| Authors: | Zhou Hongyu Wang Wanhong Yan Yiming Fan Guoying |
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| Institution: | Institute of Low Energy Nuclear Physics |
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| Abstract: | 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. |
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| Keywords: | nuclear reaction cylindrical sample neutron fluence attenuation gammaray self-absorption gammaray production cross section |
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