对称精力的密度依赖和在质子(中子) 的中子皮肤的厚度的效果在 Sn 同位素上导致了反应借助于改进分子的动力学模型被调查。调查证明为质子的反应十字节的目标尺寸依赖在 Sn 同位素上导致了反应对对称精力和对目标的中子皮肤的厚度敏感...对称精力的密度依赖和在质子(中子) 的中子皮肤的厚度的效果在 Sn 同位素上导致了反应借助于改进分子的动力学模型被调查。调查证明为质子的反应十字节的目标尺寸依赖在 Sn 同位素上导致了反应对对称精力和对目标的中子皮肤的厚度敏感的更少的密度依赖敏感原子核，而是那，因为中子在 Sn 同位素上导致了反应，它是对对称精力的密度依赖敏感、对目标原子核的中子皮肤的厚度敏感的更少。展开更多
We investigate the 800 MeV proton-induced spallation reactions on various targets by the improved quantum molecular dynamics （ImQMD05） model incorporated with a statistical decay model （SDM）. The influence of the ...We investigate the 800 MeV proton-induced spallation reactions on various targets by the improved quantum molecular dynamics （ImQMD05） model incorporated with a statistical decay model （SDM）. The influence of the nucleon-nucleon effective interaction on proton induced spallation reactions is studied by using different Skyrme interactions. It is found that the low energy part of the neutron double differential cross sections （DDCS）, which is mainly contributed from the decay of the excited residue, is influenced by the effective nucleon-nucleon interaction strongly., while the high energy part of neutron DDCS is influenced weakly. Among the Skyrme interactions used in the calculations, the calculation results with SkP give the best agreement with the experimental data.展开更多
The dynamic, adiabatic and diabat ic entrance potentials in strongly damped reactions of ^238 U＋^238 U, ^232 Th ＋ ^250Cf are calculated and compared. The feature of the dynamical potential implies that it is possibl...The dynamic, adiabatic and diabat ic entrance potentials in strongly damped reactions of ^238 U＋^238 U, ^232 Th ＋ ^250Cf are calculated and compared. The feature of the dynamical potential implies that it is possible for the composite systems to stick together for a period of time. By means of the improved quantum molecular dynamics model the time evolution of the density and charge distributions of giant composite systems and their fragments for reactions ^238U＋^238U, ^232Th＋^250Cf are investigated, from which the lifetimes of giant composite systems at different energies are obtained. The longest average lifetime of ^238U＋^238U is found when the incident energy is about Ec.m =1080 MeW, which is about 1200 fm/c.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 10675172 and 10235030, and the National Basic Research Program of China under Grant No 2007CB209900.
文摘对称精力的密度依赖和在质子(中子) 的中子皮肤的厚度的效果在 Sn 同位素上导致了反应借助于改进分子的动力学模型被调查。调查证明为质子的反应十字节的目标尺寸依赖在 Sn 同位素上导致了反应对对称精力和对目标的中子皮肤的厚度敏感的更少的密度依赖敏感原子核，而是那，因为中子在 Sn 同位素上导致了反应，它是对对称精力的密度依赖敏感、对目标原子核的中子皮肤的厚度敏感的更少。
基金Supported by the National Natural Science Foundation of China under Grant No 10235030, the Major State Basic Research and Development Programme of China under Grant No G20000774.
文摘We investigate the 800 MeV proton-induced spallation reactions on various targets by the improved quantum molecular dynamics （ImQMD05） model incorporated with a statistical decay model （SDM）. The influence of the nucleon-nucleon effective interaction on proton induced spallation reactions is studied by using different Skyrme interactions. It is found that the low energy part of the neutron double differential cross sections （DDCS）, which is mainly contributed from the decay of the excited residue, is influenced by the effective nucleon-nucleon interaction strongly., while the high energy part of neutron DDCS is influenced weakly. Among the Skyrme interactions used in the calculations, the calculation results with SkP give the best agreement with the experimental data.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10235030 and 10675170.
文摘The dynamic, adiabatic and diabat ic entrance potentials in strongly damped reactions of ^238 U＋^238 U, ^232 Th ＋ ^250Cf are calculated and compared. The feature of the dynamical potential implies that it is possible for the composite systems to stick together for a period of time. By means of the improved quantum molecular dynamics model the time evolution of the density and charge distributions of giant composite systems and their fragments for reactions ^238U＋^238U, ^232Th＋^250Cf are investigated, from which the lifetimes of giant composite systems at different energies are obtained. The longest average lifetime of ^238U＋^238U is found when the incident energy is about Ec.m =1080 MeW, which is about 1200 fm/c.
