Erlangen 2026 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 5: Structure and Dynamics of Nuclei II

HK 5.2: Vortrag

Montag, 16. März 2026, 16:45–17:00, AM 00.021

A Bayesian approach to the Coulomb breakup of 19C — •Quentin Bozet and Pierre Capel — Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany

The breakup of weakly bound nuclei is a key probe of nuclear structure at the limits of stability. In this work, we investigate the breakup of the one-neutron halo nucleus 19C on a lead target at 69AMeV using the Coulomb-Corrected Eikonal approximation (CCE). To rigorously quantify uncertainties and constrain model parameters, we employ a Bayesian analysis framework for the description of 19C, more specifically on its binding energy and asymptotic normalization constant (ANC). Posterior distributions on these two quantities are inferred from the comparison of precise reaction calculations to experimental cross sections measured at RIKEN as a function of the 18C-n relative energy. Using these posteriors leads also to a good agreement with the cross sections measured as a function of the scattering angle.These experimental cross section as a function of the center of mass energy are indeed used during the computation of the posteriors. Comparison between the posteriors and the experimental cross sections as a function of the scattering angle. Our results demonstrate that Bayesian inference, when combined with the CCE, provides a powerful methodology for interpreting breakup data of exotic nuclei. It enables us to infer reliable estimates of structure observables with meaningful uncertainties.