Přehled o publikaci

Neutron scattering on exotic nuclides is a class of processes that cannot be studied directly now and in any foreseeable 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 have so far been 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, providing a more reliable basis for understanding such experimental studies. Qualitatively different phase shifts for the 8He +p T = 5/2 and T = 3/2 resonances are predicted by ICM with a quite unusual profile for the T = 5/2 states. An 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. The crucial importance of studies of the neutron-emission channel for disentangling this possible influence is demonstrated.