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Influence of the giant dipole resonance in the statistical decay of the compound nucleus160Er

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Zeitschrift für Physik A Atomic Nuclei

Abstract

Evaporation residue excitation functions and statisticalγ-ray spectra have been measured in the heavy ion fusion reaction16O+144Nd →160Er betweenE Lab=76 and 105 MeV. In agreement with statistical model calculations, the evolution of theγ-ray spectra as a function of the compound nucleus excitation energy is consistent with the emission of high-energyγ rays (Eγ>10 MeV) in the early stage of the decay process. The description of the evaporation residue distributions by the statistical model is improved if aγ strength function including a giant dipole resonance built on each excited state and describing the shape of the measured statisticalγ-ray spectra is used in the calculations. The present analysis shows, however, that there is a strong correlation between the parameters of the resonance deduced from the fit to theγ-ray spectra and other parameters of the statistical model, in particular the level density parameter.

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Authors and Affiliations

  1. Département de Physique Nucléaire/Basses Energies, CEN Saclay, Gif sur Yvette, France

    S. Tobbeche & J. Barrette

  2. Centre de Recherches Nucléaires, Strasbourg, France

    B. Haas, F. A. Beck, T. Byrski, G. Duchene, C. Gehringer, J. C. Merdinger, A. Nourreddine & J. P. Vivien

Authors
  1. S. Tobbeche
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  2. J. Barrette
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  3. B. Haas
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  4. F. A. Beck
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  5. T. Byrski
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  6. G. Duchene
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  7. C. Gehringer
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  8. J. C. Merdinger
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  9. A. Nourreddine
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  10. J. P. Vivien
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Tobbeche, S., Barrette, J., Haas, B. et al. Influence of the giant dipole resonance in the statistical decay of the compound nucleus160Er. Z. Physik A - Atomic Nuclei 325, 85–93 (1986). https://doi.org/10.1007/BF01294247

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  • DOI: https://doi.org/10.1007/BF01294247

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