High-Energy Multifragmentation

Authors: G. Raciti, G. Imme, J.C. Adloff, M. Begemann-Blaich, P. Bouissou, J. Hubele, I. Iori, P. Kreutz, G.J. Kunde, S. Leray, V. Lindenstruth, U. Lynen, R.J. Meijer, U. Milkau, A. Moroni, W.F.J. Müller, C. Ngo, C.A. Ogilvie, J. Pochodzalla, G. Rudolf, H. Sann, A. Schüttauf, W. Seidel, L. Stuttge, W. Trautmann, and A. Tucholski
Published: Proceedings of the 1st Joint Italian-Japanese Meeting Within The INFN-RIKEN Agreement: Perspectives In Heavy Ion Physics, 29 Sep - 3 Oct 1992, Catania, Italy
    Edited by M. Di Toro and E. Migneco, (Conference Proceedings of the Italian Physical Society, v, 38), p. 317 [->Spires]
Abstract: We review our current results on the fragmentation of Au projectiles after collision with C, Al, Cu, and Pb targets at an incident energy of 600 MeV/u. The measured distributions are given as functions of an impact parameter observable, the total charge of all projectile fragments in an event, Zbound. It is found that the correlation between mean IMF multiplicity <MIMF> and Zbound extending from evaporation process to the total disassembly of the projectile, is independent of the target. This universal behavior may suggest an equilibration of the projectile fragment prior to its decay. Therefore the experimental data are compared to the predictions of statistical multifragmentation and sequential evaporation models. The sequential model clearly fails to reproduce the data. The statistical multifragmentation calculations reproduce the behavior of the <MIMF> vs. Zbound correlations but predict too symmetric a break-up. A better agreement is found by using a percolation model.
Paper: PDF 12 pages with 7 embedded figures (3.3 Mb) [Scanned]

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