Entrance-channel mass-asymmetry dependence of compound nucleus formation time in light heavy-ion reactions
- Instituto de Fisica da Universidade de Sao Paulo, Departamento de Fisica Nuclear-Laboratorio, Pelletron, Caixa Postal 66318-05389-970 Sao Paulo, (Brasil)
- Departamento de Fisica, Instituto Tecnologico da Aeronautica, Centro Tecnico Aerospacial, 12228-900 Sao Jose dos Campos, (Brasil)
- Centre de Recherches Nucleaires, Institut National de Physique Nucleaire et de Physique des Particules-Centre National de la Recherche Scientifique/Universite Louis Pasteur, Boite Postale 28, F-67037 Strasbourg Cedex 2 (France)
- National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
The entrance-channel mass-asymmetry dependence of the compound nucleus formation time in light heavy-ion reactions has been investigated within the framework of semiclassical dissipative collision models. The model calculations have been applied successfully to the formation of the {sup 38}Ar compound nucleus as populated via the {sup 9}Be+{sup 29}Si, {sup 11}B+{sup 27}Al, {sup 12}C+{sup 26}Mg, and {sup 19}F+{sup 19}F entrance channels. The shape evolution of several other light composite systems appears to be consistent with the so-called {open_quote}{open_quote}Fusion Inhibition Factor{close_quote}{close_quote} which has been observed experimentally. As found previously in more massive systems for the fusion-evaporation process, the entrance-channel mass-asymmetry degree of freedom appears to determine the competition between the different mechanisms as well as the time scales involved. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 401151
- Journal Information:
- Physical Review, C, Vol. 54, Issue 6; Other Information: PBD: Dec 1996
- Country of Publication:
- United States
- Language:
- English
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