Giant Dipole Resonance in the Hot and Thermalized 132Ce Nucleus: Damping of Collective Modes at Finite Temperature

Wieland, O.; LO BRACCO, Angelo; Camera, F.; Benzoni, G.; Blasi, N.; Brambilla, S.; Crespi, F.; Giussani, A.; Leoni, S.; Mason, P.; Million, B.; Moroni, A.; Barlini, S.; Kravchuk, V. L.; Gramegna, F.; Lanchais, A.; Mastinu, P.; Maj, A.; Brekiesz, M.; Kmiecik, M.; Bruno, M.; Geraci, E.; Casini, G.; Chiari, M.; Nannini, A.; Ordine, A.; Ormand, E.

doi:10.1103/PhysRevLett.97.012501

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The gamma decay of the giant dipole resonance (GDR) in the 132Ce compound nucleus with temperature up to about 4 MeV has been measured, using the reaction 64Ni + 68Zn at Ebeam = 300, 400, and 500 MeV. The gammas and charged particles measured in coincidence with recoils are consistent with a fully equilibrated compound nucleus emission. The GDR width, obtained with the statistical model analysis, is found to increase almost linearly with temperature. This increase is rather well reproduced within a model including thermal shape fluctuations and the lifetime of the compound nucleus.

Titolo:	Giant Dipole Resonance in the Hot and Thermalized 132Ce Nucleus: Damping of Collective Modes at Finite Temperature
Autori interni:	O. Wieland LO BRACCO, Angelo F. Camera G. Benzoni N. Blasi S. Brambilla F. Crespi GIUSSANI, Andrea S. Leoni P. Mason B. Million A. Moroni S. Barlini V. L. Kravchuk F. Gramegna A. Lanchais P. Mastinu A. Maj M. Brekiesz M. Kmiecik M. Bruno GERACI, Elena Irene G. Casini M. Chiari A. Nannini A. Ordine E. Ormand mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2006
Rivista:	PHYSICAL REVIEW LETTERS
Abstract:	The gamma decay of the giant dipole resonance (GDR) in the 132Ce compound nucleus with temperature up to about 4 MeV has been measured, using the reaction 64Ni + 68Zn at Ebeam = 300, 400, and 500 MeV. The gammas and charged particles measured in coincidence with recoils are consistent with a fully equilibrated compound nucleus emission. The GDR width, obtained with the statistical model analysis, is found to increase almost linearly with temperature. This increase is rather well reproduced within a model including thermal shape fluctuations and the lifetime of the compound nucleus.
Handle:	http://hdl.handle.net/20.500.11769/44194
Appare nelle tipologie:	1.1 Articolo in rivista

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