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light fragment and neutron emission in high-energy proton induced spallation reactions

Chinese Physics C 2021年第8期45卷 119-131页

作者： Hui-Gan Cheng Zhao-Qing Feng School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China

The dynamics of high-energy proton-induced spallation reactions on target nuclides of 56Fe,58Ni,107Ag,112d,184W,181Ta,197Au,and 208Pb are investigated with the quantum molecular dynamics transport model motivated by the China initiative Accelerator Driven System(CiADS)in Huizhou and the China Spallation Neutron Source(CSNS)in *** production mechanism of light nuclides and fission fragments is thoroughly analyzed,and the results obtained thereby are compared with available experimental *** statistical code GEMINI is employed in conjunction with a transport model for describing the decay of primary *** the treatment of cluster emission during the preequilibrium stage,a surface coalescence model is implemented into the *** is found that the available data in terms of total fragment yields are well reproduced in the combined approach for spallation reactions both on the heavy and light *** energetic light nuclides(deuteron,triton,helium isotopes etc)mainly created during the preequilibrium stage are treated within the framework of surface coalescence,whereas their evaporation is described in the conventional manner by the GEMINI *** this combined approach,a good overall description of light clusters and neutron emission is obtained,and some discrepancies with the experimental data are *** production of radioactive isotopes in the spallation reactions is also analyzed,i.e.,the 6.8He energy spectra.

关键词： spallation reaction LQMD transport model light charged particle neutron double differential cross section

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