The α-cluster structures for 12^C and 16^O are investigated in the framework of the covariant density functional theory, where the pairing correlation is treated with a particle number conserving shell-model-like app...The α-cluster structures for 12^C and 16^O are investigated in the framework of the covariant density functional theory, where the pairing correlation is treated with a particle number conserving shell-model-like approach. The ground states of 12^C and 160 have been calculated and the density distributions demonstrate an equilateral triangle 3α clustering for 12^C and a regular tetrahedron 4α clustering for 16^O The existence of linear nα chain structure of both 12^C and 16^O is revealed at high quadrupole deformation.展开更多
Ground state properties for Mg isotopes, including binding energies, one- and two-neutron separation energies, pairing energies, nuclear matter radii and quadrupole deformation parameters, are obtained from the self- ...Ground state properties for Mg isotopes, including binding energies, one- and two-neutron separation energies, pairing energies, nuclear matter radii and quadrupole deformation parameters, are obtained from the self- consistent relativistic mean field （RMF） model with the pairing correlations treated by a shell-mode-like approach （SLAP）, in which the particle-number is conserved and the blocking effects are treated exactly. The experimental data, including the binding energies and the one- and two-neutron separation energies, which are sensitive to the treatment of pairing correlations and block effects, are well reproduced by the RMF＋SLAP calculations.展开更多
在相对论平均场(Relativistic Mean Field,RMF)理论框架下,利用类壳模型(Shell-model-Like APproach,SLAP)方法处理对关联,对Ni同位素的基态性质进行系统研究,并与相对论的Hartree-Bogoliubov理论以及实验数据进行比较.计算结果表明:RMF...在相对论平均场(Relativistic Mean Field,RMF)理论框架下,利用类壳模型(Shell-model-Like APproach,SLAP)方法处理对关联,对Ni同位素的基态性质进行系统研究,并与相对论的Hartree-Bogoliubov理论以及实验数据进行比较.计算结果表明:RMF-SLAP方法能够正确地给出原子核的结合能、单双中子分离能和对能,再现结合能的奇偶振荡现象,很好地描述了Ni同位素的基态性质.展开更多
The effects of pairing correlation in Yb isotopes are investigated by covariant density functional theory with pairing correlations and blocking effects treated exactly by a shell model like approach （SLAP）. Experim...The effects of pairing correlation in Yb isotopes are investigated by covariant density functional theory with pairing correlations and blocking effects treated exactly by a shell model like approach （SLAP）. Experimental one- and two-neutron separation energies are reproduced quite well. The traditional BCS calculations always give larger pairing energies than those given by SLAP calculations, particularly for the nuclei near the proton and neutron drip lines. This may be caused because many of the single particle orbits above the Fermi surface are involved in the BCS calculations, but many of them are excluded in the SLAP calculations.展开更多
Within the relativistic mean field （RMF） theory, the ground state properties of dysprosium isotopes are studied using the shell-model-like approach （SLAP）, in which pairing correlations are treated with particle- ...Within the relativistic mean field （RMF） theory, the ground state properties of dysprosium isotopes are studied using the shell-model-like approach （SLAP）, in which pairing correlations are treated with particle- number conservation, and the Pauli blocking effects are taken into account exactly. For comparison, calculations of the Bardeen Cooper Schrieffer （BCS） model with the RMF are also performed. It is found that the RMF＋SLAP calculation results, as well as the RMF＋BCS ones, reproduce the experimental binding energies and one- and twoneutron separation energies quite well. However, the RMF＋BCS calculations give larger pairing energies than those obtained by the RMF＋SLAP calculations, in particular for nuclei near the proton and neutron drip lines. This deviation is discussed in terms of the BCS particle-number fluctuation, which leads to the sizable deviation of pairing energies between the RMF＋BCS and RMF＋SLAP models, where the fluctuation of the particle number is eliminated automatically.展开更多
基金Supported by Major State Basic Research Development (973) Program (2007CB815000)NSFC (11175002,11105005)Research Fund for the Doctoral Program of Higher Education (20110001110087)
文摘The α-cluster structures for 12^C and 16^O are investigated in the framework of the covariant density functional theory, where the pairing correlation is treated with a particle number conserving shell-model-like approach. The ground states of 12^C and 160 have been calculated and the density distributions demonstrate an equilateral triangle 3α clustering for 12^C and a regular tetrahedron 4α clustering for 16^O The existence of linear nα chain structure of both 12^C and 16^O is revealed at high quadrupole deformation.
基金Supported by NSFC(11465001,11275098,11275248,11505058,11165001)Natural Science Foundation of Inner Mongolia of China(2016BS0102)
文摘Ground state properties for Mg isotopes, including binding energies, one- and two-neutron separation energies, pairing energies, nuclear matter radii and quadrupole deformation parameters, are obtained from the self- consistent relativistic mean field （RMF） model with the pairing correlations treated by a shell-mode-like approach （SLAP）, in which the particle-number is conserved and the blocking effects are treated exactly. The experimental data, including the binding energies and the one- and two-neutron separation energies, which are sensitive to the treatment of pairing correlations and block effects, are well reproduced by the RMF＋SLAP calculations.
文摘在相对论平均场(Relativistic Mean Field,RMF)理论框架下,利用类壳模型(Shell-model-Like APproach,SLAP)方法处理对关联,对Ni同位素的基态性质进行系统研究,并与相对论的Hartree-Bogoliubov理论以及实验数据进行比较.计算结果表明:RMF-SLAP方法能够正确地给出原子核的结合能、单双中子分离能和对能,再现结合能的奇偶振荡现象,很好地描述了Ni同位素的基态性质.
基金Supported by"the Fundamental Research Funds for the Central Universities"(JUSRP1035)NSFC(11305077,11335002)
文摘The effects of pairing correlation in Yb isotopes are investigated by covariant density functional theory with pairing correlations and blocking effects treated exactly by a shell model like approach （SLAP）. Experimental one- and two-neutron separation energies are reproduced quite well. The traditional BCS calculations always give larger pairing energies than those given by SLAP calculations, particularly for the nuclei near the proton and neutron drip lines. This may be caused because many of the single particle orbits above the Fermi surface are involved in the BCS calculations, but many of them are excluded in the SLAP calculations.
基金Supported by Fundamental Research Funds for the Central Universities(JUSRP1035)National Natural Science Foundation of China(11305077)
文摘Within the relativistic mean field （RMF） theory, the ground state properties of dysprosium isotopes are studied using the shell-model-like approach （SLAP）, in which pairing correlations are treated with particle- number conservation, and the Pauli blocking effects are taken into account exactly. For comparison, calculations of the Bardeen Cooper Schrieffer （BCS） model with the RMF are also performed. It is found that the RMF＋SLAP calculation results, as well as the RMF＋BCS ones, reproduce the experimental binding energies and one- and twoneutron separation energies quite well. However, the RMF＋BCS calculations give larger pairing energies than those obtained by the RMF＋SLAP calculations, in particular for nuclei near the proton and neutron drip lines. This deviation is discussed in terms of the BCS particle-number fluctuation, which leads to the sizable deviation of pairing energies between the RMF＋BCS and RMF＋SLAP models, where the fluctuation of the particle number is eliminated automatically.
