Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-04-28
Phys.Rev. C74 (2006) 064605
Physics
Nuclear Physics
Nuclear Theory
Extended version published in Phys. Rev. C, 16 pages and 5 figures
Scientific paper
10.1103/PhysRevC.74.064605
A nucleon-nucleus interaction model has been applied to ascertain the underlying character of the negative-parity spectra of four isobars of mass seven, from neutron-- to proton--emitter driplines. With one single nuclear potential defined by a simple coupled-channel model, a multichannel algebraic scattering approach (MCAS) has been used to determine the bound and resonant spectra of the four nuclides, of which ^7He and ^7B are particle unstable. Incorporation of Pauli blocking in the model enables a description of all known spin-parity states of the mass-7 isobars. We have also obtained spectra of similar quality by using a large space no-core shell model. Additionally, we have studied ^7Li and ^7Be using a dicluster model. We have found a dicluster-model potential that can reproduce the lowest four states of the two nuclei, as well as the relevant low-energy elastic scattering cross sections. But, with this model, the rest of the energy spectra cannot be obtained.
Amos Ken
Canton Luciano
der Knijff Dirk van
Karataglidis Steven
Pisent G.
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