Giant Dipole Resonance in the Hot and Thermalized 132Ce Nucleus
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Published: 2006
Total Pages: 6
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DOWNLOAD EBOOKThe [gamma] decay of the Giant Dipole Resonance in the 132Ce compound nucleus with temperature up to ≈ 4 MeV has been measured. The symmetric 64Ni + 68Zn at E{sub beam} = 300, 400, 500 MeV and the asymmetric reaction 16O + 116Sn at E{sub beam} = 130, 250 MeV have been investigated. Light charged particles and [gamma] rays have been detected in coincidence with the recoiling compound system. In the case of the mass symmetric 64Ni induced reaction the [gamma] and charged particle spectral shapes are found to be consistent with the emission from a fully equilibrated compound nuclei and the GDR parameters are extracted from the data using a statistical model analysis. The GDR width is found to increase almost linear with temperature. This increase is rather well reproduced within a model which includes both the thermal fluctuation of the nuclear shape and the lifetime of the compound nucleus.