Crossing the Dripline to 11N Using Elastic Resonance Scattering
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/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-.
Cite
@article{arxiv.nucl-ex/0006011,
title = {Crossing the Dripline to 11N Using Elastic Resonance Scattering},
author = {K. Markenroth and L. Axelsson and S. Baxter and M. J. G. Borge and C. Donzaud and S. Fayans and H. O. U. Fynbo and V. Z. Goldberg and S. Grevy and D. Guillemaud-Mueller and B. Jonson and K. -M. Kallman and S. Leenhardt and M. Lewitowicz and T. Lonnroth and P. Manngard and I. Martel and A. C. Mueller and I. Mukha and T. Nilsson and G. Nyman and N. A. Orr and K. Riisager and G. V. Rogachev and M. -G. Saint-Laurent and I. N. Serikov and N. B. Shul'gina and O. Sorlin and M. Steiner and O. Tengblad and M. Thoennessen and E. Tryggestad and W. H. Trzaska and F. Wenander and J. S. Winfield and R. Wolski},
journal= {arXiv preprint arXiv:nucl-ex/0006011},
year = {2009}
}
Comments
14 pages, 9 figures, twocolumn Accepted for publication in PRC