2025/02/20 by M. S. Khirk, Khirk, M. S., Л. В. Григоренко +5
Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Nuclear Theory (nucl-th) #Quantum Chromodynamics and Particle Interactions #Quantum, superfluid, helium dynamics
paper · pdf · doi:10.48550/arxiv.2502.14595
openalex publication_date 2025/02/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Neutron scattering on exotic nuclides is a class of processes which can not be studied directly now and in any observable future. Resonance proton scattering of exotic nuclide on a thick target in inverse kinematics can be used to infer the properties of the low-energy neutron scattering of this nuclide assuming the isobaric symmetry. However, the results of such resonance proton scattering reactions are so far analyzed in theoretical approaches (optical, R-matrix models), which are missing important aspects of isospin dynamics, isospin violation in continuum and threshold dynamics. The isospin conserving coupled-channel model (ICM) is proposed, which provides a more reliable basis for understanding of such experimental studies. Qualitatively different phase shifts for the 8He+p T=5/2 and T=3/2 resonances are predicted by ICM with quite unusual profile for the T=5/2 states. Alternative interpretation of the existing 8He+p data is proposed. The observable properties of the T=5/2 resonances may be strongly affected by the isobaric-partner T=3/2 states. Crucial importance of studies of the neutron-emission channel for disentangling this possible influence is demonstrated.