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Nuclear Theory·nucl-th

Friday·November 1, 2024

8 papers—3 primary·5 cross-listed

All8Primary3Cross-lists5
  1. 01

    [Submitted on 30 Oct 2024]

    One-proton emission of Sb and its sensitivity to proton-neutron interaction

    Tomohiro Oishi · Masaaki Kimura · Lorenzo Fortunato

    One-proton emission from the Sb nucleus is discussed, assuming an inert Sn core and the valence proton and neutron. There are experimentally measured bound states in the Sn-neutron system, whereas no particle-bound Sn-proton state has been observed. With time-dependent three-body calculations, the ground state of Sb is suggested as a possible proton emitter. This conclusion is reached by assuming a weakening effect on the proton-neutron () interaction with respect to a bare deuteron. An analogous phenomenon is necessary to reproduce the empirical binding energies of Sc and F. Continuous shift from the unbound to bound regions by changing the -interaction strength is demonstrated. The lower limit of lifetime is evaluated as seconds in the no--interaction limit. However, the actual lifetime is expected as longer with a finite interaction. Observation of a resonant state in Sb and its decay would provide a benchmark of the -pairing correlation.

    Comments:
    6 pages, 6 figures, 4 tables. Title is changed: the previous title was "Is Sb particle-bound or a proton emitter?''. Accepted in Phys. Rev. C
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2410.23418 [pdf]
    PRC(2025)·0 citations
  2. 02

    [Submitted on 30 Oct 2024]

    Pauli energy contribution to nucleus-nucleus interaction

    A.S. Umar🇺🇸 · K. Godbey🇺🇸 · C. Simenel🇦🇺

    The investigation delves into understanding how the Pauli exclusion principle influences the bare potential between atomic nuclei through the application of advanced theoretical methodologies. Specifically, the application of the novel Frozen-Hartree-Fock (DCFHF) technique is employed. The resulting potentials demonstrate a noticeable repulsion at short distances, attributed to the effects of the Pauli exclusion principle. To account for dynamic phenomena, such as nucleon transfer processes, the density-constrained time-dependent Hartree-Fock (DC-TDHF) method is utilized. This approach integrates isovector contributions into the potential, shedding light on their influence on fusion reactions. Notably, the inclusion of isovector effects leads to a reduction or enhancement in the inner part of the potential, suggesting a nuanced role of transfer in the fusion process.

    Comments:
    6 pages, 6 figures, proceedings for FUSION23. arXiv admin note: text overlap with arXiv:2105.05245
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2410.23489 [pdf]
    EPJ Web Conf.(2024)·0 citations
  3. 03

    [Submitted on 31 Oct 2024]

    A two-body femtoscopy approach to the proton-deuteron correlation function

    Juan M. Torres-Rincon🇪🇸 · Angels Ramos🇪🇸 · Joel Rufí🇪🇸

    The proton-deuteron correlation function measured by the ALICE collaboration in high multiplicity p+p collisions shows a momentum dependence which is in contradiction with the predictions of the Lednický-Lyuboshitz formalism of the two-body interaction. This result motivated a more sophisticated three-body description in terms of a composite deuteron. Encouraged by the good description of other deuteron observables in the context of heavy-ion collisions, we revisit this correlation function under the two-body approximation without relying on the Lednický-Lyuboshitz approximation, but using the solution of the Schrödinger equation by incorporating both strong and Coulomb interactions. The two-body description provides a reasonable agreement to ALICE data for natural values of the source size. Interpreting the previously assumed attractive character of the channel of the interaction into a more-likely repulsion, the results agree better not only with the ALICE measurements but also with recent STAR data in Au+Au collisions.

    Comments:
    verson 2: 17 pages, 6 figures. Typos corrected, references added and new appendix on the Lednicky-Lyuboshitz formalism included
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    2410.23853 [pdf]
    PRC(2025)·18 citations

Affiliations

first authorsco-authorsvia INSPIRE