Vaporization and multifragmentation in the reaction 1.2 GeV + Cu and Ag

Autor: P. Figuera, Jerzy Jastrzębski, M. Morjean, B. Lott, T. von Egidy, S. Proschitzki, W. Bohne, S. Schmid, J. Galin, D. Polster, B. Quednau, U. Jahnke, L. Pienkowski, A. Péghaire, W. Schmid, Frank Goldenbaum, D. Hilscher, Guntram Pausch, H. Rossner
Přispěvatelé: Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Rok vydání: 2000
Předmět:
Zdroj: Physics Letters B
Physics Letters B, Elsevier, 2000, B472, pp.15-20. ⟨10.1016/S0370-2693(99)01410-0⟩
Physics Letters B, 2000, B472, pp.15-20. ⟨10.1016/S0370-2693(99)01410-0⟩
ISSN: 0370-2693
Popis: Reactions of 1.2 GeV antiprotons with Cu and Ag targets have been studied. It was found that in such reactions, excitation energies are generated in excess of the total binding energy of the nuclei involved. Accordingly, one observes in these reactions the onset of vaporization and multifragmentation processes. In the p + Cu reaction, the vaporization is observed to set in at about 7.5 MeV/nucleon. However, its probability remains relatively small and below 15% up to the highest excitation energies identified in the present studies (approximately 15 MeV/nucleon). The threshold excitation energy for multifragmentation processes, defined as the detection of at least 3 intermediate mass fragments, is observed at about 4 MeV/nucleon for both studied reactions. Multifragmentation is seen to account for no more than approximately 5% and 20% of the corresponding inclusive yield for Cu and Ag targets, respectively.
Databáze: OpenAIRE
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