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

Journal Article · Fri Jul 07 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.97.012501· OSTI ID:20777375

Wieland, O; Bracco, A; Camera, F; Benzoni, G; Blasi, N; Brambilla, S; Crespi, F; Giussani, A; Leoni, S; Mason, P; Million, B; Moroni, A ^[1]; Barlini, S; Kravchuk, V L; Gramegna, F; Lanchais, A; Mastinu, P ^[2]; Maj, A; Brekiesz, M; Kmiecik, M ^[3]

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1. Dipartimento di Fisica, Universita di Milano and Istituto Nazionale di Fisica Nucleare Sezione di Milano, Via Celoria 16, 20133 Milan (Italy)
2. Laboratori Nazionali di Legnaro, Istituto Nazionale di Fisica Nucleare, 35020 Legnaro (Italy)
3. Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Cracow (Poland)

The {gamma} decay of the giant dipole resonance (GDR) in the {sup 132}Ce compound nucleus with temperature up to {approx_equal}4 MeV has been measured, using the reaction {sup 64}Ni+{sup 68}Zn at E{sub 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.

• OSTI ID: 20777375
• Journal Information: Physical Review Letters, Vol. 97, Issue 1; Other Information: DOI: 10.1103/PhysRevLett.97.012501; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CERIUM 132
CHARGED PARTICLES
COMPOUND NUCLEI
DAMPING
DIPOLES
FLUCTUATIONS
GAMMA DECAY
GIANT RESONANCE
LIFETIME
MEV RANGE 100-1000
NICKEL 64
STATISTICAL MODELS
ZINC 68