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Thermal multifragmentation in p + Au interactions at 2.16, 3.6 and 8.1 GeV incident energies |
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| Authors: | S.P. Avdeyev V.A. Karnaukhov W.D. Kuznetsov L.A. Petrov V.K. Rodionov A.S. Zubkevich H. Oeschler O.V. Bochkarev L.V. Chulkov E.A. Kuzmin A. Budzanovski W. Karcz M. Janicki E. Norbeck A.S. Botvina W.A. Friedman W. Nörenberg G. Papp |
| Affiliation: | Joint Institute for Nuclear Research, 141980, Dubna, Russia, RU Institut für Kernphysik, Technische Universit?t Darmstadt, 64289 Darmstadt, Germany, DE Kurchatov Institute, 123182 Moscow, Russia, RU H. Niewodniczanski Institute of Nuclear Physics, 31-342, Cracow, Poland, PL University of Iowa, Iowa City, IA 52242, USA, US INFN and Dipartimento di Fisica, 40126 Bologna, Italy, IT Physics Department, University of Wisconsin, Madison, Wisconsin 53706, USA, US Gesellschaft für Schwerionenforschung, D-64291 Darmstadt, Germany, DE |
| Abstract: | Multiple emission of intermediate-mass fragments has been studied for the collisions p + Au at 2.16, 3.6 and 8.1 GeV with the FASA setup. The mean IMF multiplicities for events with at least one IMF are equal to 1.7, 1.9 and 2.1 (±0.2) respectively. The multiplicity, charge distributions and kinetic energy spectra of IMF are described in the framework of a intranuclear cascade model followed by the statistical multifragmentation model. However, between the two parts of the calculation the excitation energies and the residual masses and charges are modified to take into account the losses during expansion. The results support a scenario of true thermal multifragmentation of a hot and expanded target spectator. Received: 15 December 1997 / Revised version: 24 April 1998 |
| Keywords: | PACS:25.70.Pq Multifragment emission and correlations – 25.70.Mn Projectile and target fragmentation – 25.40.Ve Other reactions above meson production thresholds (energies >400 MeV) |
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