1. Breakup time scale studied in the 8 GeV/c $\PI\$ $^{-}$+$^{197}$Au reaction
- Author
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Pienkowski, L., Kwiatkowski, K., Lefort, T., Hsi, W. -C., Beaulieu, L., Botvina, A., Back, B., Breuer, H., Gushue, S., Korteling, R. G., Laforest, R., Martin, E., Ramakrishnan, E., Remsberg, L. P., Rowland, D., Ruangma, A., Viola, V. E., Winchester, E., Yennello, S. J., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Indiana University Cyclotron Facility (IUCF), Indiana University [Bloomington], Indiana University System-Indiana University System, and Guesnon, Sandrine
- Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Theory ,FOS: Physical sciences ,Nuclear Experiment (nucl-ex) ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Experiment - 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., Comment: 12 pages including 3 postscript figures
- Published
- 2002