title: Giant dipole resonance in the hot and thermalized 132Ce nucleus: damping of collective modes at finite temperature.
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.
authors.affiliation: Dipartimento di Fisica, Universitá di Milano and Istituto Nazionale di Fisica Nucleare Sezione di Milano, Via Celoria 16, 20133 Milano, Italy.
authors.forename: O
authors.initials: O
authors.lastname: Wieland
authors.forename: A
authors.initials: A
authors.lastname: Bracco
authors.forename: F
authors.initials: F
authors.lastname: Camera
authors.forename: G
authors.initials: G
authors.lastname: Benzoni
authors.forename: N
authors.initials: N
authors.lastname: Blasi
authors.forename: S
authors.initials: S
authors.lastname: Brambilla
authors.forename: F
authors.initials: F
authors.lastname: Crespi
authors.forename: A
authors.initials: A
authors.lastname: Giussani
authors.forename: S
authors.initials: S
authors.lastname: Leoni
authors.forename: P
authors.initials: P
authors.lastname: Mason
authors.forename: B
authors.initials: B
authors.lastname: Million
authors.forename: A
authors.initials: A
authors.lastname: Moroni
authors.forename: S
authors.initials: S
authors.lastname: Barlini
authors.forename: V L
authors.initials: VL
authors.lastname: Kravchuk
authors.forename: F
authors.initials: F
authors.lastname: Gramegna
authors.forename: A
authors.initials: A
authors.lastname: Lanchais
authors.forename: P
authors.initials: P
authors.lastname: Mastinu
authors.forename: A
authors.initials: A
authors.lastname: Maj
authors.forename: M
authors.initials: M
authors.lastname: Brekiesz
authors.forename: M
authors.initials: M
authors.lastname: Kmiecik
authors.forename: M
authors.initials: M
authors.lastname: Bruno
authors.forename: E
authors.initials: E
authors.lastname: Geraci
authors.forename: G
authors.initials: G
authors.lastname: Vannini
authors.forename: G
authors.initials: G
authors.lastname: Casini
authors.forename: M
authors.initials: M
authors.lastname: Chiari
authors.forename: A
authors.initials: A
authors.lastname: Nannini
authors.forename: A
authors.initials: A
authors.lastname: Ordine
authors.forename: E
authors.initials: E
authors.lastname: Ormand