The ground-state properties of the recent reported proton emitter 145Tm have been studied within the axially or triaxially deformed relativistic mean field (RMF) approaches, in which the pairing correlation is taken into account by the BCS-method with a constant pairing gap. It is found that triaxiality and pairing correlations play important roles in reproducing the experimental one proton separation energy. The single-particle level, the proton emission orbit, the deformation parameters beta = 0.22 and gamma = 28.98 and the corresponding spectroscopic factor for 145Tm in the triaxial RMF calculation are given as well.
Coupling shape and pairing vibrations in a collective Hamiltonian based on nuclear energy density functionals (II): low-energy excitation spectra of triaxial nuclei
Calculation of multidimensional potential energy surfaces for even-even transuranium nuclei: Systematic investigation of the triaxiality effect on fission barrier
Collectivity in the light Xenon isotopes: A shell model study
在相互作用壳模型(ISM)的框架下研究了最轻的氙同位素。价空间包括位于幻闭包N=Z=50和N=Z=82之间的所有轨道。计算产生的集体变形结构的三轴性质,包括很好地已知的实验数据。对N=Z核108- 108进行了预测(仍然未知)。结果解释为正宇称轨道的伪SU(3)结构增强的四极关联与0 h 11/2轨道引入的配对关联之间的竞争。我们还研究了100-Sn核的激发对我们预测的影响。我们表明,在这个区域中的回弯是由于在0 h 11/2轨道的两个粒子的对齐。在N=Z的情况下,一个中子和一个质子对准J=11和T=0。在110- 110和112- 110中,对准开始于J=10 T=1通道,并且它主要是中子中子型。接近能带终止时,一个中子和一个质子的排列变成J=11和T=0。我们以一种更学术的态度,探讨了等矢量和等密度配对关联对108-π和110-π的结构的作用,并研究了等矢量和等密度配对凝聚在这些N~Z核中的作用。
Multi-dimensional potential energy surfaces and non-axial octupole correlations in actinide and transfermium nuclei from relativistic mean field models
We have developed multi-dimensional constrained covariant density functional theories (MDC-CDFT) for finite nuclei in which the shape degrees of freedom β_{λμ} with even μ, e.g., β_{20}, β_{22}, β_{30}, β_{32}, β_{40}, etc., can be described simultaneously. The functional can be one of the following four forms: the meson exchange or point-coupling nucleon interactions combined with the non-linear or density-dependent couplings. For the pp channel, either the BCS approach or the Bogoliubov transformation is implemented. The MDC-CDFTs with the BCS approach for the pairing (in the following label…
Double Gamow-Teller transitions and its relation to neutrinoless $ββ$ decay
本文采用最先进的大尺度核壳模型计算方法研究了$^{48}$ Ca的双Gamow-Teller(DGT)强度分布。分析表明,DGT巨共振的质心能量主要取决于等矢量对相互作用,而共振宽度则对等oscillation对相互作用更为敏感。配对关联在无中微子$ββ$($0νββ$)衰变中也很关键。我们发现$^{48}$ Ca DGT巨共振的质心能量和宽度与$0νββ$衰变核矩阵元的%值之间有一个简单的关系。更一般地说,我们观察到一个非常好的线性相关性之间的DGT过渡到基态的最终核和$0νββ$衰变矩阵元素。的相关性,这起源于占主导地位的短程字符的两个过渡,延伸到较重的系统,包括几个$ββ$发射器,并在能量密度泛函的结果也持有。我们的研究结果表明,DGT实验可以是一个非常有价值的工具,以获得信息的价值$0νββ$衰变核基质元素。