154 research outputs found
Search for Multifragmentation Near Threshold in the 3-He + Ag Reaction
This research was sponsored by the National Science Foundation Grant NSF PHY-931478
Multifragment Emission in the 3-He + nat-Hg Reaction at 0.90 and 3.6 GeV
This research was sponsored by the National Science Foundation Grant NSF PHY-931478
Chaotic Scattering in Heavy--Ion Reactions
We discuss the relevance of chaotic scattering in heavy--ion reactions at
energies around the Coulomb barrier. A model in two and three dimensions which
takes into account rotational degrees of freedom is discussed both classically
and quantum-mechanically. The typical chaotic features found in this
description of heavy-ion collisions are connected with the anomalous behaviour
of several experimental data.Comment: 35 pages in RevTex (version 3.0) plus 27 PostScript figures
obtainable by anonymous ftp from VAXFCT.CT.INFN.IT in directory kaos. Fig. 1
upon request to the authors. To be published in the October Focus issue on
chaotic scattering of CHAO
EVOLUTION OF THE FUSION LIKE PROCESS AROUND THE FERMI ENERGY
The study of evaporation residue from the Ne + Ag system shows that there is qualitative change in the reaction mechanism in the Fermi energy domain. At 20 MeV/u the projectile is mostly absobered by the target, while at 30-37 MeV/u a continious range of mass transfer with a large transverse momentum is observed
Interprétation de fonctions d'excitation de réactions partielles 51V(p, n)51Cr à l'aide du modèle statistique
Partial cross-sections have been obtained between 2 and 4.6 MeV from measurements of the γ rays emitted in the 51V(p, n) reaction. They are compared with theoretical curves from an Hauser and Feshbach calculation using optical model parameters. Agreement occurred with some values of spin proposed for the first low-lying levels of 51Cr. Fluctuations around a smooth curve observed in the excitation functions are discussed.Les sections efficaces de différentes réactions partielles 51V(p, n) 51Cr ont été extraites de mesures du rayonnement γ accompagnant ces réactions. De 2 à 4,6 MeV, leur variation en fonction de l'énergie a été comparée aux courbes théoriques calculées d'après Hauser et Feshbach à l'aide de paramètres du modèle optique. Des indications concernant les spins et les parités des 5 premiers niveaux de 51Cr en ont été déduites. Les fluctuations de sections efficaces autour de la valeur moyenne sont discutées
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