Quenching of photon decay in hot giant dipole resonances
Anno: 1994
Autori: Smerzi A., Di Toro M., Brink D.M.
Affiliazione autori: Dipartimento di Fisica dell´Università di Catania, 57, Corso Italia, 95129 Catania, Italy; INFN, Laboratorio Nazionale del Sud, Catania, Italy; Dipartimento di Fisica, Università di Trento, 38050 Povo Trento, Italy
Abstract: The quenching of photon decays in giant dipole resonances (GDR) at high excitation energy (E*) is explained as due to the competition between gamma-ray and particle emission. This effect is related to a large increase of the GDR width with the temperature of the nucleus in presence of a pre-equilibrium mechanism that also tends to reduce the collective dipole strength. A saturation of the GDR width at high excitation energy cannot account for the experimental data. Limiting temperatures for the observation of GDR gamma-decays are deduced. The E*-dependence of photon yields above the GDR region is also discussed.
Giornale/Rivista: PHYSICS LETTERS B
Volume: 320 (3-4) Da Pagina: 216 A: 220
Parole chiavi: Excitation-energy Dependence; Collective Motion; Nuclei; Temperature; WidthDOI: 10.1016/0370-2693(94)90647-5Citazioni: 24dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
