We investigate the properties of A^+c- and Ab-hypernuclei within the framework of the relativistic mean-field model (RMF). It is found that no A^+c bound states can exist if the A^+c potential well depth |UA^+c| in nu...We investigate the properties of A^+c- and Ab-hypernuclei within the framework of the relativistic mean-field model (RMF). It is found that no A^+c bound states can exist if the A^+c potential well depth |UA^+c| in nuclear matter is less than 10 MeV. If |UA^+c|is less than 20 MeV, A^+c cannot bind to the heavier nuclei with atomic number larger than 100. We suggest it is preferable to search the A^+c-hypernuclei from medium-heavy nuclear systems in experiment. Very small spin-orbit splitting for the A^+c in hypernuclei is a/so observed, and for the Ab it is nearly zero.展开更多
The effect of surface delta-interaction (SDI) in nucleon-pair shell model truncated to an SD-subspace isstudied. The results show that with the single-particle level splitting fully taken into account, for realistic S...The effect of surface delta-interaction (SDI) in nucleon-pair shell model truncated to an SD-subspace isstudied. The results show that with the single-particle level splitting fully taken into account, for realistic SDI strength,the surface delta-interaction also enhance the E2 and M1 transitions of low-lying states.展开更多
Effect of conversion process (≡^-P→AA) on ≡--hypernucleus is studied for ≡^12-Be. It is found that the conversion process has a certain extent effect on properties of low-lying states of the ≡^--hypernuclei.
We examine the effect of adding mesons fo(975)and φ(1020)as well as the variety of U(the potential well depth ofin nuclear matter)from -10 MeV to -28 MeV on the extent of the particles participation and the propertie...We examine the effect of adding mesons fo(975)and φ(1020)as well as the variety of U(the potential well depth ofin nuclear matter)from -10 MeV to -28 MeV on the extent of the particles participation and the properties of the neutron star in the relativistic mean field model.We find that considering the contribution of fo and φ mesons,the equation of state of the neutron star turns soft,the maximum mass reduces while the corresponding radius increases.hyperons appear at lower density as Ubecomes deeper,and the variety of Uhas little effect on the equation of state and the properties of the neutron star.展开更多
文摘We investigate the properties of A^+c- and Ab-hypernuclei within the framework of the relativistic mean-field model (RMF). It is found that no A^+c bound states can exist if the A^+c potential well depth |UA^+c| in nuclear matter is less than 10 MeV. If |UA^+c|is less than 20 MeV, A^+c cannot bind to the heavier nuclei with atomic number larger than 100. We suggest it is preferable to search the A^+c-hypernuclei from medium-heavy nuclear systems in experiment. Very small spin-orbit splitting for the A^+c in hypernuclei is a/so observed, and for the Ab it is nearly zero.
文摘The effect of surface delta-interaction (SDI) in nucleon-pair shell model truncated to an SD-subspace isstudied. The results show that with the single-particle level splitting fully taken into account, for realistic SDI strength,the surface delta-interaction also enhance the E2 and M1 transitions of low-lying states.
文摘Effect of conversion process (≡^-P→AA) on ≡--hypernucleus is studied for ≡^12-Be. It is found that the conversion process has a certain extent effect on properties of low-lying states of the ≡^--hypernuclei.
基金The project supported in part by the Postdoctoral Science Foundation of China under Grant No.2002032169+2 种基金National Natural Science Foundation of China under Grant No.10275037the Foundation for Doctorate Training Program of China under Grant No.2001005
文摘We examine the effect of adding mesons fo(975)and φ(1020)as well as the variety of U(the potential well depth ofin nuclear matter)from -10 MeV to -28 MeV on the extent of the particles participation and the properties of the neutron star in the relativistic mean field model.We find that considering the contribution of fo and φ mesons,the equation of state of the neutron star turns soft,the maximum mass reduces while the corresponding radius increases.hyperons appear at lower density as Ubecomes deeper,and the variety of Uhas little effect on the equation of state and the properties of the neutron star.
