Giant dipole resonance in the hot and thermalized Ce132 Nucleus: Damping of collective modes at finite temperature

Wieland, O.; Bracco, A.; 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.; Vannini, G.; Casini, G.; Nannini, A.; Ordine, A.; Ormand, E.

doi:10.1103/PhysRevLett.97.012501

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

Giant dipole resonance in the hot and thermalized Ce132 Nucleus: Damping of collective modes at finite temperature / Wieland, O., Bracco, A., 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., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - ELETTRONICO. - 97:(2006), pp. 0-0. [10.1103/PhysRevLett.97.012501]