Compound and quasi-compound states in low-energy scattering of nucleons from 12C

Abstract

A multi-channel algebraic scattering theory has been used to study the properties of nucleon scattering from 12C and of the sub-threshold compound nuclear states, accounting for properties in the compound nuclei to ~10 MeV. All compound and quasi-compound resonances observed in total cross-section data are matched, and on seeking solutions of the method at negative energies, all sub-threshold states in 13C and 13N are predicted with the correct spin-parities and with reasonable values for their energies. A collective-model prescription has been used to define the initiating nucleon-12C interactions and via use of orthogonalizing pseudo-potentials, account is made of the Pauli principle. Information is extracted on the underlying structure of each state in the compound systems by investigating the zero-deformation limit of the results.

21 pages, 12 figures, 7 tables

References in corpus (2)

• An algebraic solution of the multichannel problem applied to low energy nucleon-nucleus scattering
• Role of the Pauli principle in collective-model coupled-channels calculations

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• Collective-coupling analysis of spectra of mass-7 isobars: ^7He, ^7Li, ^7Be, ^7B
• Constraints on the spectra of 17,19C
• Comparison between two methods of solution of coupled equations for low-energy scattering
• Low-energy neutron-12C analyzing powers: Results from a multichannel algebraic scattering theory
• Particle-unstable light nuclei with a Sturmian approach that preserves the Pauli principle
• Coupled-channel calculation of bound and resonant spectra of Lambda-9Be and Lambda-13C hypernuclei