Positron production in heavy ion collisions: Current status of the problem

I Ahmad,S.B Gazes,D Bazin,G Xu,M.R Maier,M Freer,W Kutschera,M Wolanski,P Chowdhury,T Happ,D Mercer,P Wilt,M Liu,E Kashy,C J Lister ,A A Chishti ,F Calaprice ,R W Dunford ,Jay Greenberg ,Ajith Perera ,A R Young ,A H Wuosmaa ,R R Betts ,A L Hallin ,T A Trainor ,S J Freedman ,F L H Wolfs ,N I Kaloskamis ,J S Winfield ,Kevin C Chan ,Sam M Austin ,J D Fox ,B B Back ,M Rhein ,D Roa ,J P Schiffer ,J Yurkon

doi:10.1016/0375-9474(94)00667-c

Positron production in heavy ion collisions: Current status of the problem

I Ahmad, S.B Gazes + Show 35 more

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https://doi.org/10.1016/0375-9474(94)00667-c

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Journal: Nuclear physics. A	Publication Date: Feb 1, 1995
Citations: 7	License type: cc-by-nc-nd

Affiliation: Argonne National Laboratory, University of Chicago, Michigan State University, Yale University, Lawrence Berkeley National Laboratory, University of Birmingham, GSI Helmholtz Centre for Heavy Ion Research, Queens University, Queen's University, Princeton University, University of Rochester, University of Washington, Florida State University

#Production In Heavy Ion Collisions #Energy Spectra Of Positrons + Show 8 more

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Abstract

Narrow peaks have been observed at GSI Darmstadt in the energy spectra of positrons and sum-energy spectra of positron-electron pairs, produced in collisions of very heavy ions. To date, there is no satisfactory explanation of the origin of these lines although many differing models have been proposed. In this contribution, the authors describe the features of a new experiment aimed at the study of the line phenomenon and present the results of their first experiments. The specific goals of their experiment are to clarify the experimental situation regarding the lines through high-resolution, high-statistics data and, by direct measurement of the vector momenta of the peak pairs, to determine their kinematics.

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