Low-lying states in the unbound $^{11}\mathrm{N}$ nucleus

Low-lying states in the unbound ${}^{11}N$ nucleus

E. Casarejos, C. Angulo, P. J. Woods, F. C. Barker, P. Descouvemont, M. Aliotta, T. Davinson, P. Demaret, M. Gaelens, P. Leleux, Z. Liu, M. Loiselet, A. S. Murphy, A. Ninane, I. A. Roberts, G. Ryckewaert, J. S. Schweitzer, and F. Vanderbist

Phys. Rev. C 73, 014319 – Published 31 January 2006

Abstract

We have investigated the low-energy states of ${}^{11}N$ by the resonant elastic-scattering method in inverse kinematics using a ${}^{10}C$ beam and a (CH $_{2})_{n}$ target at the CYCLONE facility at Louvain-la-Neuve. Recoil protons were detected at laboratory angles $θ_{lab} = 5 . 2^{°} − 18 . 3^{°}$ in a $Δ E − E$ detector system. The absolute ${}^{10}C$ +p elastic cross-section data were analyzed in the R-matrix framework. We found ${}^{11}N$ to be unbound with respect to proton emission by $1.54 \pm 0.02$ MeV, with a decay width of $0.83 \pm 0.03$ MeV. These results are used to calculate the two-proton decay width of the ${}^{12}O$ ground state.

Received 1 July 2005

DOI:https://doi.org/10.1103/PhysRevC.73.014319

Authors & Affiliations

E. Casarejos¹, C. Angulo¹, P. J. Woods², F. C. Barker³, P. Descouvemont⁴, M. Aliotta², T. Davinson², P. Demaret¹, M. Gaelens^1,*, P. Leleux¹, Z. Liu², M. Loiselet¹, A. S. Murphy², A. Ninane¹, I. A. Roberts², G. Ryckewaert¹, J. S. Schweitzer⁵, and F. Vanderbist¹

¹Centre de Recherches du Cyclotron and Institut de Physique Nucléaire, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
²School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
³Department of Theoretical Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia
⁴Physique Nucléaire Théorique et Physique Mathématique CP229, Université Libre de Bruxelles, B-1050 Brussels, Belgium
⁵Laboratory for Nuclear Science, University of Connecticut, Storrs, Connecticut 06269-3046, USA

^*Present address: IBt Int. Brachytherapy, B-7180 Seneffe, Belgium.

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Vol. 73, Iss. 1 — January 2006

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Physical Review C

covering nuclear physics

Low-lying states in the unbound ${}^{11}N$ nucleus

E. Casarejos, C. Angulo, P. J. Woods, F. C. Barker, P. Descouvemont, M. Aliotta, T. Davinson, P. Demaret, M. Gaelens, P. Leleux, Z. Liu, M. Loiselet, A. S. Murphy, A. Ninane, I. A. Roberts, G. Ryckewaert, J. S. Schweitzer, and F. Vanderbist

Phys. Rev. C 73, 014319 – Published 31 January 2006

Abstract

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Physical Review C

covering nuclear physics

Low-lying states in the unbound N11 nucleus

E. Casarejos, C. Angulo, P. J. Woods, F. C. Barker, P. Descouvemont, M. Aliotta, T. Davinson, P. Demaret, M. Gaelens, P. Leleux, Z. Liu, M. Loiselet, A. S. Murphy, A. Ninane, I. A. Roberts, G. Ryckewaert, J. S. Schweitzer, and F. Vanderbist

Phys. Rev. C 73, 014319 – Published 31 January 2006

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Low-lying states in the unbound ${}^{11}N$ nucleus