Coupled-channel evaluations of cross sections for scattering involving particle-unstable resonances.
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.
Fraser
P
P
School of Physics, University of Melbourne, Victoria 3010, Australia. pfraser@ph.unimelb.edu.au
Amos
K
K
Canton
L
L
Pisent
G
G
Karataglidis
S
S
Svenne
J P
JP
van der Knijff
D
D