Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2000-06-21
Phys.Rev. C62 (2000) 034308
Physics
Nuclear Physics
Nuclear Experiment
14 pages, 9 figures, twocolumn Accepted for publication in PRC
Scientific paper
10.1103/PhysRevC.62.034308
The level structure of the unbound nucleus 11N has been studied by 10C+p elastic resonance scattering in inverse geometry with the LISE3 spectrometer at GANIL, using a 10C beam with an energy of 9.0 MeV/u. An additional measurement was done at the A1200 spectrometer at MSU. The excitation function above the 10C+p threshold has been determined up to 5 MeV. A potential-model analysis revealed three resonance states at energies 1.27 (+0.18-0.05) MeV (Gamma=1.44 +-0.2 MeV), 2.01(+0.15-0.05) MeV, (Gamma=0.84 +-$0.2 MeV) and 3.75(+-0.05) MeV, (Gamma=0.60 +-0.05 MeV) with the spin-parity assignments I(pi) =1/2+, 1/2- and 5/2+, respectively. Hence, 11N is shown to have a ground state parity inversion completely analogous to its mirror partner, 11Be. A narrow resonance in the excitation function at 4.33 (+-0.05) MeV was also observed and assigned spin-parity 3/2-.
Axelsson L.
Baxter Stephen
Borge M. J. G.
Donzaud Corinne
Fayans S.
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