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Nuclear Theory·nucl-th

Friday·March 13, 2026

13 papers—3 primary·10 cross-listed

All13Primary3Cross-lists10
  1. 01

    [Submitted on 12 Mar 2026]

    Gamow-Teller strength of C within deformed quasiparticle random-phase approximation

    Eunja Ha · Myung-Ki Cheoun · H. Sagawa · Gianluca Colò

    We investigate the Gamow-Teller (GT) transition strength distributions in the light carbon isotopes C within the framework of the deformed quasiparticle random-phase approximation (DQRPA). Nuclear deformation is explicitly incorporated through Skyrme Hartree-Fock mean-field calculations combined with the QRPA formalism. The residual particle-hole and particle-particle interactions are derived from Brückner -matrix calculations based on the CD-Bonn potential, and their impact on the low-lying GT strengths is systematically examined by varying the corresponding interaction strengths. We find that nuclear deformation, associated with a reduced spin-orbit strength, plays a significant role in interpreting the GT strength distribution of C. In contrast, the calculated GT strength distribution of C in the spherical limit reproduces the essential features of the experimental charge-exchange data. The case of C reveals additional high-lying GT strength associated with deformation-induced configuration mixing.

    Comments:
    26 pages,13 figures, 5 Tables
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2603.11429 [pdf]
    0 citations
  2. 02

    [Submitted on 12 Mar 2026]

    Impact of octupole correlation on the inverse quasifission in collisions

    Zhenji Wu · Xiang-Xiang Sun · Lu Guo

    Multinucleon transfer (MNT) reactions offer a promising pathway to synthesize neutron-rich heavy nuclei, but the mechanism of inverse quasifission, as a key reaction channel of MNT, still remains not well understood. We employ time-dependent Hartree-Fock theory to investigate the reaction mechanism, especially the role of the octupole deformed shell in the MNT reaction of . The results show that inverse quasifission occurs when the deformed projectile and target collide in near tip-tip and tip-side orientations, which favors production of neutron-rich transtarget nuclei. Interestingly, the distributions and single-particle spectra of primary products reveal that the octupole deformed shell in light fragments dominates inverse quasifission instead of the spherical shells of at a center-of-mass energy of , thus explaining the experimental observation that the yields of the transtarget products are enhanced in the Au region. Further exploration finds that quantum shell effects in inverse quasifission exhibit energy dependence. These results demonstrate that the octupole deformed shell plays a crucial role in the inverse quasifission dynamics, significantly advancing the understanding of the MNT reaction mechanism.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2603.11613 [pdf]
    PRC(2026)·4 citations
  3. 03

    [Submitted on 12 Mar 2026]

    The Matter Radius of 132Sn and the CREX-PREX Dilemma

    J. Piekarewicz

    The density dependence of the nuclear symmetry energy remains a central open problem in nuclear physics. Parity violating electron scattering experiments have provided largely model-independent determinations of the neutron skin thickness of both 48Ca and 208Pb, whose consistent theoretical interpretation remains challenging. A new measurement of the matter radius of the unstable, doubly magic nucleus 132Sn provides an important additional constraint. Using a representative set of covariant energy density functionals spanning a wide range of isovector properties, we show that at least one of these models can simultaneously reproduce the charge and matter radii of132Sn. When interpreted together with the PREX and CREX results, the new measurement--much like CREX--favors a relatively soft symmetry energy. These findings underscore the need for an independent confirmation of the PREX result, such as the anticipated MREX campaign at the MESA facility.

    Comments:
    6 pages, 4 figures, and 2 tables
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2603.11983 [pdf]
    2 citations

Affiliations

first authorsco-authorsvia INSPIRE