Phys. Rev. C 65, 064606 (2002) [8 pages]Breakup time scale studied in the 8 GeV/cπ-+197Au reactionReceived 4 December 2001; published 23 May 2002 Experimental data from the reaction of an 8.0GeV/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 3-5MeV/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 3-5MeV/nucleon. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.65.064606
DOI:
10.1103/PhysRevC.65.064606
PACS:
25.70.Pq, 21.65.+f, 25.40.-h, 25.80.Hp
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