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Nuclear Theory·nucl-th

Monday·June 29, 2020

8 papers—2 primary·6 cross-listed

All8Primary2Cross-lists6
  1. 01

    [Submitted on 26 Jun 2020]

    Asymptotic characteristics of decay channels of light nuclei states in the ab initio approach

    D. M. Rodkin · Yu. M. Tchuvil'sky

    A new convenient method for precise theoretical calculations of quantities of traditional theory of nuclear reactions such as widths of resonances (including sub-threshold), and asymptotic normalization coefficients is proposed. This method may be considered as a step on the road to full theoretical ab initio description of light nuclei spectroscopic data. As an illustration of this method the computational results for all relevant two-body channels for all known and some theoretically predicted states of 7Li nucleus are shown. Well-proven on a large amount of data Daejeon16 potential was used in the calculations. The most part of the results turn out to be in a good agreement with the experimental data contained in spectroscopic tables.

    Comments:
    8 pages, 5 figures, 4 tables
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2006.14839 [pdf]
    PRC(2021)·12 citations
  2. 02

    [Submitted on 26 Jun 2020]

    Large-scale shell-model calculations of nuclear Schiff moments of Xe and Hg

    Kota Yanase · Noritaka Shimizu

    The theoretical uncertainty in the nuclear Schiff moment is an obstacle to set constraints on violation beyond the standard model from experimental upper bounds on atomic electric dipole moments. We perform large-scale shell-model calculations of the Xe and Hg nuclei with realistic effective interactions. To estimate the Schiff moments caused by the , -odd interaction perturbatively, we employ the one-particle one-hole approximation to the intermediate states. The Schiff moments of Xe and Hg are reduced due to the configuration mixing by from the evaluation of the independent particle model. On the other hand, the reduction is more significant in mean-field based calculations and shell-model calculations with a drastic truncation. In order to resolve the discrepancy in the Schiff moment of Hg among several nuclear models, we survey low-energy nuclear structure. The large-scale shell-model calculations reveal that the Schiff moment of Hg is considerably quenched in the second state.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2006.15142 [pdf]
    PRC(2020)·39 citations

Affiliations

first authorsco-authorsvia INSPIRE