Within the framework of Brueckner-Hartree-Fock method,the in-medium nucleonnucleon(NN)cross section is calculated.We base our investigation on a separable Paris potential for the NN interaction and a continuous choice...Within the framework of Brueckner-Hartree-Fock method,the in-medium nucleonnucleon(NN)cross section is calculated.We base our investigation on a separable Paris potential for the NN interaction and a continuous choice for the single particle spectrum.It is found that the in-medium cross section is strongly modified by medium effect.In particular,with increasing of nuclear density,the cross sections decrease.This indicates a proper treatment of the density dependence of the in-medium NN cross sections is important.展开更多
A microscopic semi-classical approach,i.e.,the linearized Vlasov equation with a collision term treated by the relaxation time approximation,is simply described and is used to investigate the giant dipole resonance(GD...A microscopic semi-classical approach,i.e.,the linearized Vlasov equation with a collision term treated by the relaxation time approximation,is simply described and is used to investigate the giant dipole resonance(GDR)from hot super heavy compound system.The possibility of such GDRγrays emission is described also according to the fission delay.For Au+Au system(A=392)and Xe+U system(A=374),the temperature dependence of strength distribution of GDRγrays and the deformation effect on GDRγrays are discussed in framework of this approach.展开更多
The ground state properties of even-even Z=114 nuclei have been investigated in the relativistic mean-field theory with inclusion of deformations.The calculated binding energies agree well with values from macroscopic...The ground state properties of even-even Z=114 nuclei have been investigated in the relativistic mean-field theory with inclusion of deformations.The calculated binding energies agree well with values from macroscopic mass models.Calculations show that there exists a spherical shell.at N=184,because the quadrupole deformation at N=184 is zero.For nuclei near N=162,there are small prolate deformations.展开更多
基金Supported in part by the National Natural Science Foundation of ChinaShanghai Natural Science Foundationthe Grant LWTZ-1298 of Chinese Academy of Sciences。
文摘Within the framework of Brueckner-Hartree-Fock method,the in-medium nucleonnucleon(NN)cross section is calculated.We base our investigation on a separable Paris potential for the NN interaction and a continuous choice for the single particle spectrum.It is found that the in-medium cross section is strongly modified by medium effect.In particular,with increasing of nuclear density,the cross sections decrease.This indicates a proper treatment of the density dependence of the in-medium NN cross sections is important.
基金Supported by the National Natural Science Foundation of China under Grant Nos.19675059,19675960,19705012,and 19725521Shanghai Science and Technique Development Foundation under Grant Nos.96XD 14011,97QA14038,and 97XD14020。
文摘A microscopic semi-classical approach,i.e.,the linearized Vlasov equation with a collision term treated by the relaxation time approximation,is simply described and is used to investigate the giant dipole resonance(GDR)from hot super heavy compound system.The possibility of such GDRγrays emission is described also according to the fission delay.For Au+Au system(A=392)and Xe+U system(A=374),the temperature dependence of strength distribution of GDRγrays and the deformation effect on GDRγrays are discussed in framework of this approach.
基金Supported by the National Natural Science Foundation of China under Grant No.19677203the HIRFL-CSR project from the Institute of Modern Physics in Lanzhou.
文摘The ground state properties of even-even Z=114 nuclei have been investigated in the relativistic mean-field theory with inclusion of deformations.The calculated binding energies agree well with values from macroscopic mass models.Calculations show that there exists a spherical shell.at N=184,because the quadrupole deformation at N=184 is zero.For nuclei near N=162,there are small prolate deformations.
