MCAS: A Multi-Channel Algebraic Scattering Theory for low-energy scattering

by Prof. Steven Karataglidis (Rhodes University)

Tuesday 26 Aug 2008, 15:15 → 16:00 Europe/Zurich

304/1-001 (CERN)

A new model is presented for low-energy nucleon-nucleus scattering in which the resonances in the compound nucleus are described by a collective model, coupling the nucleon to states in the target. The coupled (complex) Lipmann-Schwinger equations are solved in momentum space, allowing also for the description of sub-threshold states. Central to the success of the coupled-channel calculations is the inclusion of the Pauli principle, leading to a highly non-local low-energy optical potential. Violation of the Pauli principle can be quite severe and will be discussed. Examples will be presented for the scattering from both stable and exotic nuclei, with particular emphasis on states in mass-7, 15F, and 17,19C.