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First observation of the 13Li ground state

Z. Kohley, E. Lunderberg, P. A. DeYoung, A. Volya, T. Baumann, D. Bazin, G. Christian, N. L. Cooper, N. Frank, A. Gade, C. Hall, J. Hinnefeld, B. Luther, S. Mosby, W. A. Peters, J. K. Smith, J. Snyder, A. Spyrou, and M. Thoennessen
Phys. Rev. C 87, 011304(R) – Published 31 January 2013

Abstract

The ground state of neutron-rich unbound 13Li was observed for the first time in a one-proton removal reaction from 14Be at a beam energy of 53.6 MeV/u. The 13Li ground state was reconstructed from 11Li and two neutrons giving a resonance energy of 12080+60 keV. All events involving single- and double-neutron interactions in the Modular Neutron Array (MoNA) were analyzed, simulated, and fitted self-consistently. The three-body (11Li+n+n) correlations within Jacobi coordinates showed strong dineutron characteristics. The decay energy spectrum of the intermediate 12Li system (11Li+n) was described with an s-wave scattering length of greater than 4 fm, which is a smaller absolute value than reported in a previous measurement.

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  • Received 15 November 2012

DOI:https://doi.org/10.1103/PhysRevC.87.011304

©2013 American Physical Society

Authors & Affiliations

Z. Kohley1,*, E. Lunderberg2, P. A. DeYoung2, A. Volya3, T. Baumann1, D. Bazin1, G. Christian1,4,†, N. L. Cooper5, N. Frank6, A. Gade1,4, C. Hall2, J. Hinnefeld5, B. Luther7, S. Mosby1,4,‡, W. A. Peters1,4,§, J. K. Smith1,4, J. Snyder1,4, A. Spyrou1,4, and M. Thoennessen1,4

  • 1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 2Department of Physics, Hope College, Holland, Michigan 49422, USA
  • 3Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
  • 4Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
  • 5Department of Physics and Astronomy, Indiana University at South Bend, South Bend, Indiana 46634, USA
  • 6Department of Physics and Astronomy, Augustana College, Rock Island, Illinois 61201, USA
  • 7Department of Physics, Concordia College, Moorhead, Minnesota 56562, USA

  • *kohley@nscl.msu.edu
  • Present address: TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
  • Present address: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • §Present Address: Oak Ridge Associated Universities, Oak Ridge, Tennessee 37830, USA.

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Issue

Vol. 87, Iss. 1 — January 2013

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