Hybrid potential/R-matrix models for the 12C + alpha system

Abstract

I present ongoing developments on hybrid models which combine the potential model, for the description of the background, with the R-matrix model, for the description of discrete states. Physical parameters of discrete states are converted into formal R-matrix parameters, taking into account the potential background. The nuclear part of this potential is constructed by a new variant of an inversion method based on supersymmetric quantum mechanics. The method is illustrated on 12C + alpha S-wave elastic phase shifts.

Comments: 4 pages, 2 figures, proceedings of the Eighth International Symposium on Nuclei in the Cosmos, July 19-23, 2004, Vancouver, BC, Canada