2020 Impact factor 3.043
Hadrons and Nuclei
Eur. Phys. J. A 1, 399-406

Time-scale and excitation energy partition in sequential binary decays induced by heavy-ion collisions at $\bf \simeq6$ MeV$\cdot$A

P. Boccaccio1 - L. Vannucci1 - R.A. Ricci1,2 - G. Vannini3,4 - R. Dona5,6 - I. Massa5,6 - J.P. Coffin7 - P. Fintz7 - G. Guillaume7 - F. Jundt7 - F. Rami7 - P. Wagner7

1 Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
2 Dipartimento di Fisica dell'Universita'di Padova, I-35100 Padova, Italy
3 Dipartimento di Fisica dell'Universita' di Trieste, I-34100 Trieste, Italy,
4 Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34100 Trieste, Italy
5 Dipartimento di Fisica dell'Universita' di Bologna, I-40100 Bologna, Italy,
6 Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, I-40100 Bologna, Italy
7 Centre de Recherches Nucleaires, Universite' Louis Pasteur, F-67037 Strasbourg, France

Received: 25 March 1997 / Revised version: 2 December 1997 Communicated by C. Signorini

Abstract
We studied the sequential binary decay of the systems 32S+45Sc, 76Ge, 89Y, 59Co, 63Cu and 19F+63Cu induced by collisions at $\simeq6$ MeV$\cdot$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.

PACS
25.70.Ef Resonances


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