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Phys. Rev. C 57, 628–631 (1998)

Proton decay of states in 11N

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A. Azhari1,*, T. Baumann1,†, J. A. Brown1, M. Hellström1,‡, J. H. Kelley1,§, R. A. Kryger1, D. J. Millener2, H. Madani3, E. Ramakrishnan1,*, D. E. Russ3, T. Suomijarvi1,**, M. Thoennessen1, and S. Yokoyama1
1National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
2Physics Department, Brookhaven National Laboratory, Upton, New York 11973
3Department of Chemistry, University of Maryland, College Park, Maryland 20742

Received 17 October 1997; published in the issue dated February 1998

The proton-unbound nucleus 11N has been studied via kinematic reconstruction of the emitted proton in coincidence with the residual 10C daughter nucleus. Resonances in 11N were populated by using a 40 MeV/nucleon radioactive beam of 12N to induce the reaction 9Be(12N,11N), followed by the proton decay of 11N. The decay energy spectrum was constructed from the energies and separation angle of the 10C and the proton. In addition to protons from the known 1/2- state, at 2.24 MeV above the proton decay threshold, another peak is seen near 1.45 MeV. This peak could potentially be due to the predicted 1/2+ ground state and/or due to the decay of the 3/2- state to the first excited state of 10C

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.57.628
DOI:
10.1103/PhysRevC.57.628
PACS:
23.50.+z, 25.60.Je, 27.20.+n

*Present address: Cyclotron Institute, Texas A&M University, College Station, TX 77843.

†Present address: Gesellschaft für Schwerionenforschung, D-64291 Darmstadt, Germany.

‡Present address: Department of Physics, University of Lund, P.O. Box 118, S-22100 Lund, Switzerland.

§Present address: Department of Physics, Triangle Nuclear Physics Laboratory, Duke University, Durham, NC 27708.

**Present address: Institut de Physique Nucleaire, IN2P3-CNRS, 91406 Orsay, France.

 
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