In Press
More >
  • Single-particle resonant states with Green’s function method
    Published: 2020-07-13, doi: 10.1088/1674-1137/44/8/084105
    Show Abstract
    This study employs the relativistic mean field theory with the Green's function method to study the single-particle resonant states. In contrast to our previous work [Phys. Rev. C, 90: 054321 (2014)], the resonant states are identified by searching for the poles of Green's function or the extremes of the density of states. This new approach is highly effective for all kinds of resonant states, no matter whether they are broad or narrow. The dependence on the space size for the resonant energies, widths, and the density distributions in the coordinate space has been checked and was found to be very stable. Taking 120Sn as an example, four new broad resonant states $ 2g_{7/2} $, $ 2g_{9/2} $, $ 2h_{11/2} $, and $ 1j_{13/2} $ were observed, and the accuracy for the width of the very narrow resonant state $ 1h_{9/2} $ was highly improved to $ 1\times 10^{-8} $ MeV. Further, our results are very close to those obtained using the complex momentum representation method and the complex scaling method.
  • 2νββ-decay to first 2+ states with partial isospin symmetry restoration from spherical QRPA calculations
    Published: 2020-07-13, doi: 10.1088/1674-1137/44/8/084104
    Show Abstract
    Using partially restored isospin symmetry, we calculate the nuclear matrix elements for a special decay mode of a two-neutrino double beta decay – the decay to the first 2+ excited states. Employing the realistic CD–Bonn nuclear force, we analyze the dependence of the nuclear matrix elements on the isovector and isoscalar parts of proton–neutron particle–particle interactions. The dependence on the different nuclear matrix elements is observed, and the results are explained. We also provide the phase space factors using numerical electron wavefunctions and properly chosen excitation energies. Finally, we present our results for the half-lives of this decay mode for different nuclei.
  • Analysis of survival probability based on superasymmetric reaction systems
    Published: 2020-07-10, doi: 10.1088/1674-1137/44/9/094102
    Show Abstract
    The survival probability of an excited compound nucleus was studied using two different approaches of the washing out of shell effects with excitation energy based on a superasymmetric reaction system. The estimated evaporation residue cross sections based on the two different methods are compared with the available experimental data. Both methods are in agreement with the experimental data to a certain extent for some specific reactions and $ xn$ emission channels.
Current Issued