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中高能质子入射重金属靶产生散裂中子是加速器驱动洁净核能系统的一个关键部分 .利用量子分子动力学 (QMD)模型研究入射质子能量在 3 0 0MeV—1 .5GeV ,散裂靶为2 0 8Pb的 (p ,xn)核反应的双微分截面 ,QMD计算结果很好再现了实验数据 ,且QMD的计算结果明显优于HETC和LAHET .QMD在较宽的能区和核区满足加速器驱动洁净核能系统散裂靶物理计算的要求
The generation of spallation neutrons by heavy and high energy protons in the presence of heavy metal targets is a key part of the accelerator-driven clean nuclear energy system. Using quantum molecular dynamics (QMD) model, the incident proton energy is about 300 MeV-1.5GeV and the spallation target is 20 8Pb (p, xn) nuclear reaction of the two differential cross section, QMD calculation results reproduce the experimental data well, and QMD results are significantly better than the HETC and LAHET.QMD in a wide energy and nuclear regions to meet accelerator-driven clean nuclear energy System spallation target physical calculation requirements