Neutron skins probed in proton knockout from neutron-rich nuclei

Bertulani, C. A.; Lobato, R. V.

doi:10.1103/sz51-yf8l

Neutron skins probed in proton knockout from neutron-rich nuclei

Journal Article · Tue Feb 24 00:00:00 EST 2026 · Physical Review. C

DOI:https://doi.org/10.1103/sz51-yf8l· OSTI ID:3021146

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East Texas A & M Univ., Commerce, TX (United States)
Brazilian Center for Research in Physics (Brazil)

Proton-induced quasifree knockout reactions provide a powerful probe of nuclear single-particle structure and reaction dynamics in both stable and neutron-rich nuclei. Here, in this work, we develop a unified theoretical framework for the calculation of inclusive (𝑝, 2⁢𝑝) and sequential (𝑝, 3⁢𝑝) reaction cross sections and fragment momentum distributions at intermediate and relativistic energies. The approach is based on a probabilistic extension of Glauber multiple-scattering theory combined with microscopic nuclear densities obtained from Hartree-Fock-Bogoliubov calculations using Skyrme energy-density functionals. We focus in particular on the sensitivity of total cross sections and longitudinal momentum dispersions to neutron-skin thickness along isotopic chains. Our results indicate that both (𝑝, 2⁢𝑝) and (𝑝, 3⁢𝑝) reactions exhibit a systematic decrease of cross section and momentum width with increasing neutron excess, reflecting enhanced attenuation and surface bias induced by neutron skins. The effect is significantly stronger for two-proton removal, suggesting that (𝑝, 3⁢𝑝) reactions may offer enhanced sensitivity to isovector nuclear structure. These findings establish proton-induced knockout reactions as complementary hadronic probes of neutron skins and the density dependence of the nuclear symmetry energy.

View Accepted Manuscript (DOE)

Research Organization:: East Texas A & M Univ., Commerce, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0026074

Other Award/Contract Number:: 464898/2014-5

OSTI ID:: 3021146

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 2 Vol. 113; ISSN 2469-9985; ISSN 2469-9993

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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