Coupled channels calculations in the continuum shell model with complicated configurations

Abstract

A coupled channels method for solving the continuum shell-model equations including complicated configurations is presented. The method ensures the orthogonality between the continuum and the discrete states. The single-particle resonances are treated like bound states. The structure calculations are performed independently of the coupled channels calculations. Wave functions. positions and widths of the resonances as well as the direct reaction part and the cross sections are obtained. The method allows the elimination of spurious states arising from the c.m. motion. Numerical examples are given in order to check the model. The 15N(p, n) reaction is analysed between E p = 3.75 and 7.5 MeV including 2p–2h configurations.