Study On Giant Resonance Properties Of Even-A N=82, N=126 Isotones

Giant resonance has become a hot topic in nuclear physics research.And people have done a lot of research on it.At present,people are very interested in isotones.Therefore,the giant resonance properties of N=82 and N=126 isotones are studied.In this paper,independent particle model is selected,it is based on Skyrme-Hartree-Fock+BCS and QRPA.The Skyrme type SGII,SLy5 and Sk M*interactions are used to calculate the related properties of the ground state and 2⁺and3^-excited states of N=82 and N=126 isotones.Initially,the experimental values of the proton pairing gaps are compared and repeated adjustment.The most suitable the mean value of the proton pairing gaps for the whole N=82 and N=126 isotones are found.The proton pairing interaction strength is determined.It is extended to the calculation of the properties of other nuclei on the same isotone chain.In the calculation,some ground state properties of isotones are calculated and compared with the experimental values.The results are satisfactory.Then,the calculation and analysis of 2⁺and 3^-excited states are started.It is found that the excitation energy reaches the peak at double magic nucleus ¹³²Sn and ²⁰⁸Pb.This phenomenon should be related to the shell structure.N=82 and N=126,the shell is closed.In order to get further confirmation and more valuable information,the quasiparticle configurations,transition density,response equation in the excited state are continued to study.With the increase of proton number,it is found that the primary contribution to the excited state gradually becomes proton dominated for N=82 isotones.At the same time,it also reflects the good collectivity,and the proton transition is gradually obvious.However,the result of N=126 is different,with the increase of proton number,the first 2⁺state and 3^-state are still dominated by proton transition.In the low-energy configuration,the primary contribution to the excited state gradually becomes neutrons.Although it also reflects the good collectivity,it is gradually obvious that is the neutron transition.Finally,heavy nuclear fusion is studied.It is based on test particle multi-passing over conditional saddle point method.The angular momentum factor is considered.The influences of angular momentum on passing probability are discussed.The effects of temperature and incident energy on the passing probability with different angular momentum is discussed.After adding angular momentum,it is found that the ground state positions and potential energies change.With the increase of angular momentum,the ground state position moves to the right,and the potential wells become shallower and finally disappear.The greater the angular momentum,the greater the passing probability.In addition,it is also found that the passing probability increases with the increase of temperature and incident energy at the same angular momentum.