Coupled-channel evaluations of cross sections for scattering involving particle-unstable resonances

Details Coupled-channel evaluations of cross sections for scattering involving particle-unstable resonances Coupled-channel evaluations of cross sections for scattering involving particle-unstable resonances

2008-07-18

arxiv.org/abs/0807.2914v1

Phys.Rev.Lett.101:242501,2008

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.101.242501

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 multi-channel 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 + carbon-12 scattering is studied with the target states assigned artificial widths. The second is a study of neutron scattering from beryllium-8; 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.

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