Time-scale and excitation energy partition in sequential binary decays induced by heavy-ion collisions at ?6 MeV·A |
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| Authors: | P Boccaccio L Vannucci RA Ricci G Vannini R Dona I Massa JP Coffin P Fintz G Guillaume F Jundt F Rami P Wagner |
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| Institution: | (1) Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy, IT;(2) Dipartimento di Fisica dell'Universita'di Padova, I-35100 Padova, Italy, IT;(3) Dipartimento di Fisica dell'Universita' di Trieste, I-34100 Trieste, Italy,, IT;(4) Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34100 Trieste, Italy, IT;(5) Dipartimento di Fisica dell'Universita' di Bologna, I-40100 Bologna, Italy,, IT;(6) Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, I-40100 Bologna, Italy, IT;(7) Centre de Recherches Nucleaires, Universite' Louis Pasteur, F-67037 Strasbourg, France, FR |
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| Abstract: | We studied the sequential binary decay of the systems 32S+45Sc, 76Ge, 89Y, 59Co, 63Cu and 19F+63Cu induced by collisions at ≃6 MeV·A. The two stages of the process have reaction-times compatible with the dynamics of different mechanisms. The study of the
excitation energy partition shows that the reaction mechanism of the first step has influence on the de-excitation of the
primary fragments producing two decay components which have different time scale.
Received: 25 March 1997 / Revised version: 2 December 1997 |
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| Keywords: | PACS:25 70 Ef Resonances |
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