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First observation of excited states in Li12

C. C. Hall, E. M. Lunderberg, P. A. DeYoung, T. Baumann, D. Bazin, G. Blanchon, A. Bonaccorso, B. A. Brown, J. Brown, G. Christian, D. H. Denby, J. Finck, N. Frank, A. Gade, J. Hinnefeld, C. R. Hoffman, B. Luther, S. Mosby, W. A. Peters, A. Spyrou, and M. Thoennessen
Phys. Rev. C 81, 021302(R) – Published 10 February 2010

Abstract

The neutron-unbound ground state and two excited states of Li12 were formed by the two-proton removal reaction from a 53.4-MeV/u B14 beam. The decay energy spectrum of Li12 was measured with the Modular Neutron Array (MoNA) and the Sweeper dipole superconducting magnet at the National Superconducting Cyclotron Laboratory. Two excited states at resonance energies of 250 ± 20 keV and 555 ± 20 keV were observed for the first time and the data are consistent with the previously reported s-wave ground state with a scattering length of as=13.7 fm.

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  • Received 4 December 2009

DOI:https://doi.org/10.1103/PhysRevC.81.021302

©2010 American Physical Society

Authors & Affiliations

C. C. Hall1, E. M. Lunderberg1, P. A. DeYoung1,*, T. Baumann2, D. Bazin2, G. Blanchon3, A. Bonaccorso4, B. A. Brown2,5, J. Brown6, G. Christian2,5, D. H. Denby1, J. Finck7, N. Frank2,5,†, A. Gade2,5, J. Hinnefeld8, C. R. Hoffman9,10, B. Luther11, S. Mosby2,5, W. A. Peters2,5,‡, A. Spyrou2,5, and M. Thoennessen2,5

  • 1Department of Physics, Hope College, Holland, Michigan 49423, USA
  • 2National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 3CEA, DAM, DIF F-91297 Arpajon, France
  • 4Instituto Nazionale di Fisisca Nucleare, Sez. di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy
  • 5Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
  • 6Department of Physics, Wabash College, Crawfordsville, Indiana 47933, USA
  • 7Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, USA
  • 8Department of Physics and Astronomy, Indiana University at South Bend, South Bend, Indiana 46634, USA
  • 9Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
  • 10Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 11Department of Physics, Concordia College, Moorhead, Minnesota 56562, USA

  • *deyoung@hope.edu
  • Present address: Physics Department, Augustana College, Rock Island, Illinois 61201, USA.
  • Present address: Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831, USA.

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Issue

Vol. 81, Iss. 2 — February 2010

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