Continuum Skyrme Hartree-Fock-Bogoliubov theory with Green’s function method for neutron-rich Ca,Ni,Zr,and Sn isotopes  

作　　者：En-Bo Huo Ke-Ran Li Xiao-Ying Qu Ying Zhang Ting-Ting Sun 

机构地区：[1]School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450001,China [2]School of Mechatronics Engineering,Guizhou Minzu University,Guiyang 550025,China [3]Department of Physics,School of Science,Tianjin University,Tianjin 300072,China [4]Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology,Guangxi Normal University,Guilin 541004,China

出　　处：《Nuclear Science and Techniques》2023年第7期162-178,共17页核技术（英文）

基　　金：the National Natural Science Foundation of China(No.U2032141);the Open Project of Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology(No.NLK2022-02);the Central Government Guidance Funds for Local Scientific and Technological Development,China(Guike ZY22096024);the Natural Science Foundation of Henan Province(No.202300410479);the Guizhou Provincial Science and Technology Projects(No.ZK[2022]203);the Foundation of Fundamental Research for Young Teachers of Zhengzhou University(No.JC202041041);the Physics Research and Development Program of Zhengzhou University(No.32410217).

摘　　要：The possible exotic nuclear properties in the neutron-rich Ca,Ni,Zr,and Sn isotopes are examined with the continuum Skyrme Hartree-Fock-Bogoliubov theory in the framework of the Green’s function method.The pairing correlation,the couplings with the continuum,and the blocking effects for the unpaired nucleon in odd-A nuclei are properly treated.The Skyrme interaction SLy4 is adopted for the ph channel and the density-dependentinteraction is adopted for the pp chan-nel,which well reproduce the experimental two-neutron separation energies S_(2n)and one-neutron separation energies Sn.It is found that the criterion S_(n)>0 predicts a neutron drip line with neutron numbers much smaller than those for S_(2n)>0.Owing to the unpaired odd neutron,the neutron pairing energies−E_(pair)in odd-A nuclei are much lower than those in the neighbor-ing even-even nuclei.By investigating the single-particle structures,the possible halo structures in the neutron-rich Ca,Ni,and Sn isotopes are predicted,where sharp increases in the root-mean-square(rms)radii with significant deviations from the traditional rA^(1∕3)rule and diffuse spatial density distributions are observed.Analyzing the contributions of various partial waves to the total neutron densityρlj(r)∕ρ(r)reveals that the orbitals located around the Fermi surface-particularly those with small angular momenta-significantly affect the extended nuclear density and large rms radii.The number of neutrons Nλ(N_(0))occupying above the Fermi surfacen(continuum threshold)is discussed,whose evolution as a function of the mass number A in each isotope is consistent with that of the pairing energy,supporting the key role of the pairing correlation in halo phenomena.

关 键 词：Neutron-rich nuclei Neutron halo Skyrme Hartree-Fock-Bogoliubov theory Green’s function method 

分 类 号：O562.6[理学—原子与分子物理]