/ Experiment-Nucl nucl-ex/0207001

Comparative study of multifragmentation of gold nuclei induced by relativistic protons, He-4, and C-12

Avdeyev, S.P. (Dubna, JINR) ; Karnaukhov, V.A. (Dubna, JINR) ; Petrov, L.A. (Dubna, JINR) ; Rodionov, V.K. (Dubna, JINR) ; Rukoyatkin, P.A. (Dubna, JINR) ; Toneev, V.D. (Dubna, JINR) ; Oeschler, H. (Darmstadt, Tech. Hochsch.) ; Bochkarev, O.V. (Kurchatov Inst., Moscow) ; Chulkov, L.V. (Kurchatov Inst., Moscow) ; Kuzmin, E.A. (Kurchatov Inst., Moscow) ; Budzanovski, A. (Cracow, INP) ; Karcz, W. (Cracow, INP) ; Janicki, M. (Cracow, INP) ; Norbeck, E. (Iowa U.) ; Botvina, A.S. (Moscow, INR) ; Gudima, K.K. (IAP, Chisinau)

Published in: Nucl.Phys.
Year: 2002
Vol.: A709
Page No: 392-414
Pages: 33

Abstract: Multiple emission of intermediate-mass fragments has been studied for the collisions of p, $^4$He and $^{12}$C on Au with the $4\pi$ setup FASA. The mean IMF multiplicities (for the events with at least one IMF) are saturating at the value of $2.2\pm0.2$ for the incident energies above 6 GeV. The observed IMF multiplicities cannot be described in a two-stage scenario, a fast cascade followed by a statistical multifragmentation. Agreement with the measured IMF multiplicities is obtained by introducing an intermediate phase and modifying empirically the excitation energies and masses of the remnants. The angular distributions and energy spectra from the p-induced collisions are in agreement with the scenario of ``thermal'' multifragmentation of a hot and diluted target spectator. In the case of $^{12}$C+Au(22.4 GeV) and $^4$He(14.6 GeV)+Au collisions, deviations from a pure thermal break-up are seen in the energy spectra of the emitted fragments, which are harder than those both from model calculations and from the measured ones for p-induced collisions. This difference is attributed to a collective flow.

Web-Page: http://alice.cern.ch/format/showfull?sysnb=2323856; http://www.sciencedirect.com/science?_ob=GatewayURL&_origin=SPIRES&_method=citationSearch&_volkey=03759474%23709%23392&_version=1&md5=3684222c99db304bf6cf15d3d2d0d9e0; http://www.sciencedirect.com/web-editions?_ob=GatewayURL&_origin=SPIRES&_method=citationSearch&_volkey=03759474%23709%23392&_version=1&md5=3684222c99db304bf6cf15d3d2d0d9e0

Total numbers of views: 2381
Numbers of unique views: 819
 Record created 2010-10-28, last modified 2014-01-30

External links:
Download fulltextCERNKEY
Download fulltextSCIDIR
Download fulltextWEBEDS
Rate this document:

Rate this document:
(Not yet reviewed)