Thermal multifragmentation in p + Au interactions at 2.16, 3.6 and 8.1 GeV incident energies
S.P. Avdeyev1 - V.A. Karnaukhov1 - W.D. Kuznetsov1 - L.A. Petrov1 - V.K. Rodionov1 - A.S. Zubkevich1 - H. Oeschler2 - O.V. Bochkarev3 - L.V. Chulkov3 - E.A. Kuzmin3 - A. Budzanovski4 - W. Karcz4 - M. Janicki4 - E. Norbeck5 - A.S. Botvina6,7 - W.A. Friedman8 - W. Nörenberg9 - G. Papp9
1 Joint Institute for Nuclear Research, 141980, Dubna, Russia
2 Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
3 Kurchatov Institute, 123182 Moscow, Russia
4 H. Niewodniczanski Institute of Nuclear Physics, 31-342, Cracow, Poland
5 University of Iowa, Iowa City, IA 52242, USA
6 INFN and Dipartimento di Fisica, 40126 Bologna, Italy
7 Institute for Nuclear Research, 117312, Moscow, Russia
8 Physics Department, University of Wisconsin, Madison, Wisconsin 53706, USA
9 Gesellschaft für Schwerionenforschung, D-64291 Darmstadt, Germany
Received: 15 December 1997 / Revised version: 24 April 1998 Communicated by V. Metag
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.
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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