Towards limiting temperatures in nuclei: The behavior of collective motion
Year: 1994
Authors: Le Faou J.H., Suomijärvi T., Blumenfeld Y., Piattelli P., Agodi C., Alamanos N., Alba R., Auger F., Bellia G., Chomaz P., Coniglione R., Del Zoppo A., Finocchiaro P., Frascaria N., Gaardhøje J.J., Garron J.P., Gillibert A., Lamehi-Rachti M., Liguori-Neto R., Maiolino C., Migneco E., Russo G., Roynette J.C., Santonocito D., Sapienza P., Scarpaci J.A., Smerzi A.
Autors Affiliation: Institut de Physique Nucléaire, Institut National de Physique Nucléaire et de Physique des Particules, Centre National de la Recherche Scientifique, 91406 Orsay, France; Istituto Nazionale di Fisica Nucleare–Laboratorio Nazionale del Sud, via A. Doria, Catania, Italy; Service de Physique Nucléaire, DAPNIA, Centre d’Etudes Nucleaires, Saclay , 91191 Gif-sur-Yvette, France; Grand Accelerateur National d’Ions Lourds BP 5027, 14021 Caen, France; The Niels Bohr Institute, University of Copenhagen, DK-2100 O/, Denmark.
Abstract: Gamma rays emitted from hot nuclei with mass around 115 and excitation energies between 350 and 550 MeV, formed in the Ar-36+Zr-90 reaction at 27 MeV/nucleon, have been measured. The gamma-ray yield from the decay of the giant dipole resonance in these nuclei remains constant over the excitation energy range studied. This quenching of the gamma multiplicity cannot be explained by a continuous increase with temperature of the width of the resonance. Better agreement with the data is obtained by assuming a cutoff of gamma emission from the resonance above an excitation energy of 250 MeV. The existing data do not show entrance channel effects.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 72 (21) Pages from: 3321 to: 3324
KeyWords: Giant-dipole Resonance; Hot Nuclei; Excitation-energy; Finite Temperature; DependenceDOI: 10.1103/PhysRevLett.72.3321Citations: 48data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-24References taken from IsiWeb of Knowledge: (subscribers only)
