Crossing the dripline to 11N using elastic resonance scattering

K. Markenroth et al.
Phys. Rev. C 62, 034308 – Published 16 August 2000
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Abstract

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/nucleon. 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 1.270.05+0.18 MeV (Γ=1.44±0.2 MeV), 2.010.05+0.15 MeV (Γ=0.84±0.2 MeV), and 3.75±0.05 MeV (Γ=0.60±0.05 MeV) with the spin-parity assignments Iπ=12+,12,52+, 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 32.

  • Received 22 December 1999

DOI:https://doi.org/10.1103/PhysRevC.62.034308

©2000 American Physical Society

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Vol. 62, Iss. 3 — September 2000

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