Crossing the Dripline to 11N Using Elastic Resonance Scattering

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 a...

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Detalles Bibliográficos
Autores principales: Markenroth, K., Axelsson, L., Baxter, S., Borge, M.J.G., Donzaud, C., Fayans, S., Fynbo, H.O.U., Goldberg, V.Z., Grevy, S., Guillemaud-Mueller, D., Jonson, B., Kallman, K.M., Leenhardt, S., Lewitowicz, M., Lonnroth, T., Manngard, P., Martel, I., Mueller, A.C., Mukha, I., Nilsson, T., Nyman, G., Orr, N.A., Riisager, K., Rogachev, G.V., Saint-Laurent, M.G., Serikov, I.N., Shul'gina, N.B., Sorlin, O., Steiner, M., Tengblad, O., Thoennessen, M., Tryggestad, E., Trzaska, W.H., Wenander, F., Winfield, J.S., Wolski, R.
Lenguaje:eng
Publicado: 2000
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevC.62.034308
http://cds.cern.ch/record/444370
Descripción
Sumario: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-.

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