E. Tryggestad^*, T. Baumann, P. Heckman, and M. Thoennessen

• National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
• Michigan State University, Department of Physics and Astronomy, East Lansing, Michigan 48824, USA

T. Aumann^†, D. Bazin, and Y. Blumenfeld^‡

• National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA

J. R. Beene, T. A. Lewis, D. C. Radford, D. Shapira, and R. L. Varner

• Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

M. Chartier^§

• National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
• Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831

M. L. Halbert

• University of Tennessee, Department of Physics and Astronomy, Knoxville, Tennessee 37996, USA

J. F. Liang

• Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831, USA

• ^*Present address: Institut de Physique Nucléaire, IN${}_2$P${}_3$-CNRS, 91406 Orsay Cedex, France. Email address: tryggest@ipno.in2p3.fr
• ^†Present address: Gesellschaft für Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt, Germany
• ^‡Present address: Institut de Physique Nucléaire, IN${}_2$P${}_3$-CNRS, 91406 Orsay Cedex, France.
• ^§Present address: University of Liverpool, Department of Physics, Oliver Lodge Laboratory, Oxford Street, Liverpool L69 7ZE, United Kingdom.