Theoretical description of the experimentally obtained spectra for protons and alpha-particles and model calculations for the neutron spectra in the reactions with heavy ions has been presented. The hybrid model of non-equilibrium processes was used. Equilibrium evaporation process was analyzed in the framework of the statistical theory of nuclear reactions with Monte-Carlo simulation including certain dynamical and kinematical characteristics. This approach was included in PACE code, which permits to simulate Monte-Carlo de-excitation nuclear process. The Fermi-gas model and level-density phenomenological model for the variation of the nuclear level density parameters was used. In this approach data on (16)O+(116)Sn reaction with E(beam)=130, 250 MeV were analyzed. Double-differential light charged particle spectra for this reaction were measured using the GARFIELD apparatus in coincidence with evaporation residues. The experimental data were collected in four angular ranges from 29 to 41, 41 to 53, 53 to 67 and 67 to 82 degrees in the laboratory system. The results of the calculations are shown and discussed for these four angular ranges. The contributions from the evaporative and pre-equilibrium processes were analyzed in connection with different nucleus equilibration mechanisms.

Pre-equilibrium effects in the secondary particle spectra in the reactions with heavy ions / Fotina, O. V.; Eremenko, D. O.; Parfenova, Y. U. L.; Platonov, S. Y. U.; Yuminov, O. A.; Kravchuk, V. L.; Gramegna, F.; Barlini, Sandro; Casini, Giovanni; Bruno, M.; D'Agostino, M.; Wieland, O.; Bracco, Angela; Camera, F.. - In: INTERNATIONAL JOURNAL OF MODERN PHYSICS E. - ISSN 0218-3013. - ELETTRONICO. - 19:(2010), pp. 1134-1140. (Intervento presentato al convegno International Conference on Nuclear Reactions on Nucleons and Nuclei) [10.1142/S0218301310015588].

Pre-equilibrium effects in the secondary particle spectra in the reactions with heavy ions

Barlini, S.;Casini, G.;Bracco, A.;
2010

Abstract

Theoretical description of the experimentally obtained spectra for protons and alpha-particles and model calculations for the neutron spectra in the reactions with heavy ions has been presented. The hybrid model of non-equilibrium processes was used. Equilibrium evaporation process was analyzed in the framework of the statistical theory of nuclear reactions with Monte-Carlo simulation including certain dynamical and kinematical characteristics. This approach was included in PACE code, which permits to simulate Monte-Carlo de-excitation nuclear process. The Fermi-gas model and level-density phenomenological model for the variation of the nuclear level density parameters was used. In this approach data on (16)O+(116)Sn reaction with E(beam)=130, 250 MeV were analyzed. Double-differential light charged particle spectra for this reaction were measured using the GARFIELD apparatus in coincidence with evaporation residues. The experimental data were collected in four angular ranges from 29 to 41, 41 to 53, 53 to 67 and 67 to 82 degrees in the laboratory system. The results of the calculations are shown and discussed for these four angular ranges. The contributions from the evaporative and pre-equilibrium processes were analyzed in connection with different nucleus equilibration mechanisms.
2010
INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS
International Conference on Nuclear Reactions on Nucleons and Nuclei
Fotina, O. V.; Eremenko, D. O.; Parfenova, Y. U. L.; Platonov, S. Y. U.; Yuminov, O. A.; Kravchuk, V. L.; Gramegna, F.; Barlini, Sandro; Casini, Giovanni; Bruno, M.; D'Agostino, M.; Wieland, O.; Bracco, Angela; Camera, F.
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1102086
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