Neutron knockout of 12 Be populating neutron - unbound states in 11 Be

W. A. Peters,1,2,3,* T. Baumann,3 B. A. Brown,2,3 J. Brown,4 P. A. DeYoung,5 J. E. Finck,6 N. Frank,2,3,† K. L. Jones,1,‡ J.-L. Lecouey,3,§ B. Luther,7 G. F. Peaslee,5 W. F. Rogers,8 A. Schiller,3,‖ M. Thoennessen,2,3 J. A. Tostevin,9 and K. Yoneda3,¶ 1Department of Physics and Astronomy, Rutgers, State University of New Jersey, Piscataway, New Jersey 08854, USA 2Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USA 3National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA 4Department of Physics, Wabash College, Crawfordsville, Indiana 47933, USA 5Department of Physics, Hope College, Holland, Michigan 49423, USA 6Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, USA 7Department of Physics, Concordia College, Moorhead, Minnesota 56562, USA 8Department of Physics, Westmont College, Santa Barbara, California 93108, USA 9Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU27XH, UK (Received 31 December 2010; published 31 May 2011)