统一框架下对超核_Λ~5He,_Λ~9Be,_(ΛΛ)He^6和_(ΛΛ)Be^(10)基态结合能的研究

STUDY ON THE BINDING ENERGIES OF THE FOUR HYPERNUCLEI _Λ~5He,_Λ~9Be,_(ΛΛ)He^6 AND _(ΛΛ)Be^(10) UNDER UNIFIED FRAME

用α集团模型和少体理论方法研究了超核5ΛΗe,9ΛΒe,6ΛΛΗe和10ΛΛΒe的基态结合能.所采用的α-α势符合低能α-α散射实验及8Be的基态共振能量,Λ-α势是用Λ-N势及α粒子密度分布函数拟合5ΛΗe的基态结合能的实验值得到的,Λ-Λ势是通过拟合6ΛΛΗe基态结合能的实验值而得到的.用一组α-α势,Λ-α势和Λ-Λ势统一描述这4个超核的基态结合能并得到了合理的结果.

In this paper the binding energies of the four hypernuclei 5ΛΗe,9ΛΒe,6ΛΛΗe and 10ΛΛΒe are studied with the α cluster model and fewbody theory method.The αα potentials is consistent with the observed αα scattering data and the resonant groundstate energies of 8Be.The Λα potentials are obtained by folding the ΛN potentials and the density distribution of the α particle to fit the binding energy of 5ΛΗe.The ΛΛ potentials are consistent with the experimental binding energy of 6ΛΛΗe.A group of αα,Λα and ΛΛ potentials can be used to describe this four hypernuclei binding energy and also get reasonable result.