高能质子束轰击重靶的剩余产物研究

项目名称： 高能质子束轰击重靶的剩余产物研究

项目编号： No.11305229

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 葛红林

作者单位： 中国科学院近代物理研究所

项目金额： 28万元

中文摘要： 散裂靶是散裂中子源和加速器驱动次临界系统的重要系统。高能质子束流轰击重靶时，在散裂靶及结构材料中生成大量的放射性剩余核素，散裂反应剩余产物的特征及其机理对于散裂靶设计非常重要。项目首先借助各种数值模拟程序，如MCNPX、FLUKA、GEANT4 及自主开发程序，对散裂反应进行计算，分析其机理和主要特征；同时，掌握关键测量技术，开展离线γ谱学实验研究；最后，在模拟结果的指导下，设计合理的实验方案，测量质子束流轰击各种靶材料时的散裂反应剩余产物。通过对比实验数据和数值模拟结果，探索高能质子诱发的散裂反应机理和特征，提高散裂靶模拟设计程序的可靠性。

中文关键词： 散裂靶；剩余产物；截面；蒙特卡洛模拟；

英文摘要： Spallation target is the key part of spallation neutron source (SNS) and accelerator driven sub-critical systems (ADS), the knowledge of the residual nuclides production in target materials is an important part of the spallation under the irradiation. The accuracy of such parameters is of paramount importance for the design study of the SNS and ADS. The goal of this project is to analyze the residual nuclides in the targets and the structural material irradiated with high energy protons. The residual nulicdes will be calculated with the different models incorporated in the MCNPX package、FLUKA package、GEANT4 and others code. At the same time, off-line gamma spectrometry will be developed. Using high energy proton beam from HIRFL-CSR, such measurements of residual nuclides in target and structural material will be carried out. The residual nuclides were obtained by analytical spectrum data. Through the comparison the modern code calculations of the residual nuclides with the experimental data, the refined physical model of residual nuclides parameters are proposed to simplify a technical calculation of residual nuclides in real targets.

英文关键词： spallation target；residual nuclides；cross section；Monte Carlo simulation；