Giant Dipole Resonance in the hot and thermalized 132Ce nucleus: damping of collective modes at finite temperature

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The {gamma} decay of the Giant Dipole Resonance in the {sup 132}Ce compound nucleus with temperature up to {approx} 4 MeV has been measured. The symmetric {sup 64}Ni + {sup 68}Zn at E{sub beam} = 300, 400, 500 MeV and the asymmetric reaction {sup 16}O + {sup 116}Sn 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 {sup 64}Ni induced reaction the {gamma} and charged particle spectral shapes are found to be consistent with the emission ... continued below

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6 p. (0.3 MB)

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Wieland, O; Bracco, A; Camera, F; Benzoni, G; Blasi, N; Brambilla, S et al. June 16, 2006.

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The {gamma} decay of the Giant Dipole Resonance in the {sup 132}Ce compound nucleus with temperature up to {approx} 4 MeV has been measured. The symmetric {sup 64}Ni + {sup 68}Zn at E{sub beam} = 300, 400, 500 MeV and the asymmetric reaction {sup 16}O + {sup 116}Sn 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 {sup 64}Ni 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.

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6 p. (0.3 MB)

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PDF-file: 6 pages; size: 0.3 Mbytes

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  • Journal Name: Physical Review Letters, vol. 97, N/A, July 7, 2006, pp. 012501; Journal Volume: 97

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  • Report No.: UCRL-JRNL-222203
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 936669
  • Archival Resource Key: ark:/67531/metadc897607

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  • June 16, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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  • April 13, 2017, 6:21 p.m.

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Wieland, O; Bracco, A; Camera, F; Benzoni, G; Blasi, N; Brambilla, S et al. Giant Dipole Resonance in the hot and thermalized 132Ce nucleus: damping of collective modes at finite temperature, article, June 16, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc897607/: accessed July 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.