利用MONTECARLO方法分析高能电子加速器中中子引起的感生放射性——微观分析

上海大学学报(自然科学版)

利用MONTECARLO方法分析高能电子加速器中中子引起的感生放射性——微观分析

贺新福;王传珊;罗文芸

1.上海大学射线应用研究所，上海 201800； 2.中国原子能科学研究院，北京 102413； 3.中科院上海应用物理研究所，上海 201800

收稿日期:2006-01-13 出版日期:2007-02-28 发布日期:2007-02-28

Analyzing the Induced Radiation of High Energy Electron Accelerator with the Monte Carlo Method—Microcosmic Analysis

HE Xin fu;WANG Chuan shan;LUO Wen yun;et al

1. Shanghai Applied Radiation Institute, Shanghai University, Shanghai 201800, China; 2. Chinese Institute of Atomic Energy, Beijing 102413, China; 3. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

Received:2006-01-13 Online:2007-02-28 Published:2007-02-28

摘要/Abstract

摘要： 在高能电子加速器中，高能电子与物质相互作用产生电磁簇射，生成的高能光子与介质发生光核反应，其后的中子、介子又引发核反应，并引发感生辐射场.本系列文章利用 Monte Carlo方法分析了高能电子加速器中中子引起的感生放射性以及对加速器周围环境的影响，对于制定关于停机后等待时间的规定具有指导性意义.在微观上利用多步动力学模型（Many Stage Dynamical Model，MSDM）计算了中子与不同靶材Fe、Cu、Ni的辐射损伤总截面，然后计算了能量为10、140和700 MeV的中子与加速器相互作用所产生的放射性同位素的分布及生成截面，并且对3种情况进行了比较和分析.

关键词: 多步动力学模型, 感生放射性, 同位素分布, 中子

Abstract: In a high energy electron accelerator, when high energy electrons inte ract with matter, an electromagnetic shower is induced, producing an induced rad iation field. In this paper, the Monte Carlo method is used to calculate the ind uced radiation of high energy electron accelerator induced by neutron. It is us e ful to establish a waiting time rule. The total cross section of radiation dam ag e of the interaction between the neutron and Fe, Cu and Ni is calculated using t he MSDM code. Distribution of the radioisotope and the production cross sections induced by the interaction of different energy neutron and accelerator are then obtained. A comparison of the results is presented.

Key words: induced radiation, isotope distribution, neutron, MSDM

贺新福;王传珊;罗文芸. 利用MONTECARLO方法分析高能电子加速器中中子引起的感生放射性——微观分析[J]. 上海大学学报(自然科学版).

HE Xin fu;WANG Chuan shan;LUO Wen yun;et al . Analyzing the Induced Radiation of High Energy Electron Accelerator with the Monte Carlo Method—Microcosmic Analysis[J]. Journal of Shanghai University（Natural Science Edition）.