Breakup time scale studied in the 8 GeV/c pi(-)+Au reaction
AIP Conference Proceedings(2002)
Abstract
Experimental data from the reaction of an 8.0 GeV/c pi(-) beam incident on a Au-197 target have been analyzed in order to investigate the breakup time scale for hot residues. Helium 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 seems unable to reproduce the data at excitation energies above 3 - 5 MeV/nucleon.
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