Search for Monoenergetic Positron Emission from Heavy-Ion Collisions at Coulomb-Barrier Energies

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I. Ahmad¹, Sam M. Austin², B. B. Back¹, R. R. Betts^1,3, F. P. Calaprice⁴, K. C. Chan⁵, A. Chishti⁵, C. Conner³, R. W. Dunford¹, J. D. Fox⁶, S. J. Freedman⁷, M. Freer^1,8, S. B. Gazes⁹, A. L. Hallin¹⁰, T. Happ^1,11, D. Henderson¹, N. I. Kaloskamis⁵, E. Kashy², W. Kutschera¹, J. Last¹, C. J. Lister¹, M. Liu¹⁰, M. R. Maier², D. J. Mercer², D. Mikolas², P. A. A. Perera¹², M. D. Rhein^1,11, D. E. Roa⁶, J. P. Schiffer^1,9, T. A. Trainor¹³, P. Wilt¹, J. S. Winfield², M. R. Wolanski⁹, F. L. H. Wolfs¹², A. H. Wuosmaa¹, G. Xu⁵, A. Young⁴, and J. E. Yurkon² (APEX Collaboration)
¹Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
²National Superconducting Cyclotron Laboratory and Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824
³Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607
⁴Physics Department, Princeton University, Princeton, New Jersey 08544
⁵Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520
⁶Physics Department, Florida State University, Tallahassee, Florida 32306
⁷Lawrence Berkeley Laboratory, Berkeley, California 94720
⁸School of Physics and Space Research, University of Birmingham, P.O. Box 363, Birmingham B15 2TT, England
⁹Department of Physics, University of Chicago, Chicago, Illinois 60637
¹⁰Physics Department, Queen's University, Kingston, Ontario, K7L 3N6, Canada
¹¹Gesellschaft für Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt, Germany
¹²Nuclear Structure Research Laboratory, University of Rochester, Rochester, New York 14627
¹³Nuclear Physics Laboratory, University of Washington, Seattle, Washington 98195