Breakup time scale studied in the 8 GeV/c π- + 197 Au reaction

L. Pienkowski, K. Kwiatkowski, T. Lefort, W. C. Hsi, L. Beaulieu, V. E. Viola, A. Botvina, R. G. Korteling, R. Laforest, E. Martin, E. Ramakrishnan, D. Rowland, A. Ruangma, E. Winchester, S. J. Yennello, B. Back, H. Breuer, S. Gushue, L. P. Remsberg

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Experimental data from the reaction of an 8.0 GeV/c π- beam incident on a 197Au target have been analyzed in order to investigate the breakup time scale for hot residues. Helium nuclei angular distributions and energy spectra supported by a momentum tensor analysis suggest that at large excitation energy, above 3 - 5 MeV/nucleon, highly excited heavy fragments are separated promptly after the thermalization. A binary fission-like mechanism fits the experimental data at low excitation energies, but seems unable to reproduce the data at excitation energies above 3 - 5 MeV/nucleon.

Original languageEnglish
Pages (from-to)646061-646068
Number of pages8
JournalPhysical Review C - Nuclear Physics
Issue number6
StatePublished - Jun 1 2002


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