Multifragmentation and Flow: Peripheral vs. central collisions
Multifragment decays of heavy nuclei have been studied at the ALADIN spectrometer system at beam energies between 100 and 1000 MeV per nucleon. The observed fragment distributions signal a universality of spectator decays at bombarding energies . The role of the radial flow for the fragmentation process is explored by comparing fragment distributions measured for Au+Au collisions at in central collisions and at in more peripheral reactions. At both energies the maximum multiplicity of intermediate mass fragments (IMFs) normalized to the size of the decaying system is about one IMF per 30 nucleons but the element distributions show significant differences. Within a coalescence picture the suppression of heavy fragments in central collisions at may be related to a reduction of the density in momentum space which is caused by a large collective expansion velocity component.
Repository citation: Pochodzalla, J.; Aiello, S.; Begemann-Blaich, M.; Blaich, Th.; Bowman, D. R.; Charity, R. J.; Cosmo, A.; Ferrero, A.; Gelbke, C. K.; Hsi, W. C.; Hubele, J.; Imme, G.; Iori, I.; Kempter, J.; Kreutz, P.; Kunde, G. J.; Kunze, W. D.; Lindenstruth, V.; Lisa, M. A.; Lynch, W. G.; Lynen, U.; Mang, M.; Moretto, L. G.; Moroni, A.; Müller, W. F.J.; Neumann, M.; Ocker, B.; Ogilive, C. A.; Pappalardo, V.; Peaslee, Graham F.; Raciti, G.; Rosenberger, F.; Rubehn, T.; Sann, H.; Scardaoni, R.; Schüttauf, A.; Seidei, W.; and Serfling, V., "Multifragmentation and Flow: Peripheral vs. central collisions" (1995). Faculty Publications. Paper 1176.
Published in: Nuclear Physics A, Volume 583, Issue 1, February 6, 1995, pages 553-560. Copyright © 1995 Elsevier.
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