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arXiv · 0807.2914

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

P. Fraser·K. Amos·L. Canton·G. Pisent·S. Karataglidis·J. P. Svenne·D. van der Knijff
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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 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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P. Fraser, K. Amos, L. Canton, G. Pisent, S. Karataglidis, J. P. Svenne, D. van der Knijff. 2008-07-18. Coupled-channel evaluations of cross sections for scattering involving particle-unstable resonances. https://doi.org/10.1103/physrevlett.101.242501

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