title: Coupled-channel evaluations of cross sections for scattering involving particle-unstable resonances.
abstract: How does the scattering cross section change when the colliding bound-state fragments are allowed particle-emitting resonances? This question is explored in the framework of a multichannel algebraic scattering method of determining nucleon-nucleus cross sections at low energies. Two cases are examined, the first being a gedanken investigation in which n + 12C scattering is studied with the target states assigned artificial widths. The second is a study of neutron scattering from 8Be, a nucleus that is particle unstable. Resonance character of the target states markedly varies evaluated cross sections from those obtained assuming stability in the target spectrum.
authors.affiliation: School of Physics, University of Melbourne, Victoria 3010, Australia. pfraser@ph.unimelb.edu.au
authors.forename: P
authors.initials: P
authors.lastname: Fraser
authors.forename: K
authors.initials: K
authors.lastname: Amos
authors.forename: L
authors.initials: L
authors.lastname: Canton
authors.forename: G
authors.initials: G
authors.lastname: Pisent
authors.forename: S
authors.initials: S
authors.lastname: Karataglidis
authors.forename: J P
authors.initials: JP
authors.lastname: Svenne
authors.forename: D
authors.initials: D
authors.lastname: van der Knijff