关键词: 
Thegroundstatepropertiesof¹³²Snatequilibriumandatlargecompressionareinvestigated /
withintheframeworkoftheradiallyconstrainedsphericalHartreeFock(CSHF)approximation.Thedeltaresonanceeffectsonthepropertiesofneutronrichdoublemagicsphericalnucleus /
¹³²Sn /
initsgroundstateandthestateunderstaticcompressionarestudied.ThesensitivityofthenucleonsizeandΔmodelspacesisinvestigated.Atequilibrium /
mixingbetweennucleonandΔ’sinthelargestmodelspaceofninemajornucleonshellsplus10Δorbitalswasfound.ExpandingthenucleonmodelspacehasalargereffectonreducingthestaticcompressionmodulusandsofteningthenuclearequationofstatethanincreasingthenumberofΔstates.ItwasfoundthatthemostoftheincreaseinthenuclearenergygeneratedundercompressionisusedtocreatethemassiveΔparticles.For¹³²Snnucleusundercompressionat12timesthenormalnucleardensity /
theexcitednucleonstoΔ’sincreasedsharplyupto13%ofthetotalnumberofconstituents.Thisresultisconsistentwiththevaluesextractedfromrelativisticheavyioncollisions.Thesingleparticleenergylevelscalculatedandtheirbehaviorsundercompressionareexaminedtoo.AgoodagreementbetweenresultswitheffectiveHamiltonianandthephenomenologicalshellmodelforthelowlyingsingleparticlespectraisobtained.

摘要: The ground state properties of ¹³²Sn at equilibrium and at large compression are investigated, within the framework of the radially constrained spherical HartreeFock(CSHF) approximation. The delta resonance effects on the properties of neutronrich double magic spherical nucleus, ¹³²Sn, in its ground state and the state under static compression are studied. The sensitivity of the nucleon size and Δ model spaces is investigated. At equilibrium, mixing between nucleon and Δ’s in the largest model space of nine major nucleon shells plus 10 Δ orbitals was found. Expanding the nucleon model space has a larger effect on reducing the static compression modulus and softening the nuclear equation of state than increasing the number of Δ states. It was found that the most of the increase in the nuclear energy generated under compression is used to create the massive Δ particles. For ¹³²Sn nucleus under compression at 12 times the normal nuclear density, the excited nucleons to Δ’s increased sharply up to 13% of the total number of constituents. This result is consistent with the values extracted from relativistic heavyion collisions. The single particle energy levels calculated and their behaviors under compression are examined too. A good agreement between results with effective Hamiltonian and the phenomenological shell model for the low lying singleparticle spectra is obtained.