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20 April 2024

» pubmed » pmid16907369

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Giant dipole resonance in the hot and thermalized 132Ce nucleus: damping of collective modes at finite temperature
O Wiel ; A Bracco ; F Camera ; G Benzoni ; N Blasi ; S Brambilla ; F Crespi ; A Giussani ; 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 ; E Geraci ; G Vannini ; G Casini ; M Chiari ; A Nannini ; A Ordine ; E Orm ;
Date:	7 Jul 2006
Journal:	Phys Rev Lett, 97 (1), 012501
Abstract:	The gamma decay of the giant dipole resonance (GDR) in the 132Ce compound nucleus with temperature up to approximately 4 MeV has been measured, using the reaction 64Ni + 68Zn at E(beam) = 300, 400, and 500 MeV. The gamma 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.
Source:	PubMed, pmid16907369
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