A collective coupled-channel model and mirror state energy displacements

P. R. Fraser, K. Amos, L. Canton, S. Karataglidis, D. van der Knijff, J. P. Svenne

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4 Citations (Scopus)


The spectra of nucleon-nucleus mirror systems allow examination of charge symmetry breaking in nucleon-nucleus interactions. To date, such examination has been performed with studies using microscopic models of structure. Herein we seek characterisation with a coupled-channel model in which the nucleon-nucleus interactions are described using a collective model prescription with the Pauli principle taken into account. The neutron-nucleus Hamiltonian is chosen to give the best match to the compound system spectrum, with emphasis on finding the correct ground state energy relative to the neutron-nucleus threshold. The Coulomb interactions for the proton-nucleus partner of a mirror pair are determined using charge distributions that match the root-mean-square charge radii of the nuclei in question. With the Coulomb interaction so defined modifying the neutron-nucleus Hamiltonian, we then predict a spectrum for the relevant proton-nucleus compound. Discrepancies in that resulting spectrum with measured values we tentatively ascribe to charge-symmetry breaking effects. We consider spectra obtained in this way for the mirror pairs 13C and 13N, 15C and 15F, and 15O and 15N, all to ∼ 10 MeV excitation.

Original languageEnglish
Article number110
JournalEuropean Physical Journal A
Issue number9
Publication statusPublished - 14 Sept 2015

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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