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Study Of P Shell ? Hypernuclei Using The Skyrme-Hartree-Fock Approach

Posted on:2019-04-23Degree:MasterType:Thesis
Country:ChinaCandidate:W Y LiFull Text:PDF
GTID:2370330566460577Subject:Theoretical Physics
Abstract/Summary:PDF Full Text Request
? hyperon is free from the nuclear Pauli Principle.It can enter the center of hypernuclear system and form deeply bound hypernuclei states.Because of the interaction between hyperon and nucleon,the addition of ? changes the structure of core nuclei,and the investigation of hypernuclei can provide the information about hyperon-nucleon and nucleon-nucleon interactions.Therefore the nuclear structure and hadronic many-body systems can be investigated by ? hyperon as a probe.The properties of hypernuclei have been studied by using the deformed Skyrme-Hartree-Fock approach and obtained good results.In this thesis we apply the deformed Skyrme-Hartree-Fock approach to p shell hypernuclei.Due to the "impurity effect" of ? hyperon,the density distribution of core nuclei becomes smaller and the shape is stretched.The beyond-mean-field Skyrme-Hartree-Fock approach is adopted to investigate the properties of 8Be and the corresponding single-and double-? hypernuclei ?9Be,??10Be.The Nucleon-nucleon(NN)interaction SLy4 and the nucleon-hyperon(NA)interaction Skyrme-type SLL4 are used.In order to study the effects of ? in different orbitals,we calculated the potential energy surfaces and energy spectra of different configurations 8e(?)?[000]1/2+,8e(?)?[110]1/2-,8Be(?)?[101]3/2-and 8Be(?)?[101]1/2-.The calculated energy spectra of ?9Be are given and compared with the observed results.The calculated results successfully reproduced the positive-parity spin-doublet states(3/2+,5/2+).The shrinkage effect of ? occupying ?[000]1/2+ orbit is investigated through the density distribution of nuclear matter.The electric quadrupole(E2)transition strength is given and compared with the experimental results and the results of the hypernuclear particle-rotor model,the calculated results using the beyond-mean-field Skyrme-Hartree-Fock approach are reasonable.And finally in order to show the completeness of beyond-mean-field Skyrme-Hartree-Fock approach the properties of ??10Be are studied,and the calculation of double ? binding energies agrees well with the experimental results.
Keywords/Search Tags:beyond-mean-field, ? hypernuclear, Skyrme-Hartree-Fock mode, Rotation symmetry
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