The Dependence Of Lambda Hypernuclear Properties On Various Hyperon-nucleon Interactions

Hypernuclear physics is one of the frontier fields of nuclear physics.Nowadays,the studies of hypernuclei are mainly based on the nuclear model with different ΛN interactions,which well describes the properties of hypernuclei.One notices that the Skyrme Hartree-Fock（SHF）model has achieved great success in the investigation ofΛ hypernuclei with phenomenological Skyrme-type ΛN interactions and microscopic AN interactions,respectively.However,the properties of Λ hypernuclei depend on the different effective ΛN interactions.In the thesis,taking A hypernuclei as an example,the dependence of the binding energies of A hyperon on phenomenological and microscopic ΛN interaction is systematically investigated ranging from light to heavy hypernuclei.In the frame of deformed SHF model,together with different AN interactions,including seven kinds of Skyrme-type RAY12,MDG3,YBZ1,SKSH2,YMR,HPΛ2,SLL4 and five types of microscopic interactions NSC89,NSC89’,NSC97a,NSC97f,ESC08,we systematically investigate the dependence of A binding energies of hypernuclei from light hypernuclei Λ5He to heavy hypernuclei Λ208Pb on AN interactions.TheΛ binding energies BΛ of excited Λ hypernuclei,including Λ12,13C,Λ160,Λ28Si,Λ32S,40Ca,Λ51 V,Λ89Y,Λ139La and Λ208Pb,are calculated by using the Skyrme-tupe forces YBZ1,YMR and SLL4,respectivey,which well reproduce the experimental results of ground stateΛ binding energies.The calculations indicate that the ground state Λ binding energies with the Skyrmetype ΛN interactions are reproduced better than those with microscopic interactions.In addition,YMR and SLL4 forces give the better agreement with the experimental data compared to other ΛN interactions.The combination of ΛN interaction SLy4 and ΛN interaction YMR well reproduces the A single-particle spectra of hypernuclei overall.The density distributions of hyperon in different Λ single-particle states are different.What’s more,the density distribution of nuclear core is influenced by the hyperon due to the attraction between nucleon and hyperon.