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

Abstract : Experimental data from the reaction of an 8.0 GeV/c pi- beam incident on a 197Au target have been analyzed in order to investigate the integrated breakup time scale for hot residues. Alpha-particle energy spectra and particle angular distributions supported by a momentum tensor analysis suggest that at large excitation energy, above 3-5 MeV/nucleon, light-charged particles are emitted prior to or at the same time as the emission of the heavy fragments. Comparison with the SMM and GEMINI models is presented. 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.
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Contributeur : Sandrine Guesnon <>
Soumis le : vendredi 27 novembre 2009 - 13:50:49
Dernière modification le : jeudi 1 août 2019 - 15:18:19

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L. Pienkowski, K. Kwiatkowski, T. Lefort, W. -C. Hsi, L. Beaulieu, et al.. Breakup time scale studied in the 8 GeV/c pi- + 197Au reaction. 2009. ⟨in2p3-00436632⟩



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