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Photonuclear reactions of actinides in the giant dipole resonance region

  • Regular Article - Theoretical Physics
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Abstract.

Photonuclear reactions at energies covering the giant dipole resonance (GDR) region are analyzed with an approach based on nuclear photoabsorption followed by the process of competition between light-particle evaporation and fission for the excited nucleus. The photoabsorption cross-section at energies covering the GDR region is contributed by both the Lorentz-type GDR cross-section and the quasi-deuteron cross-section. The evaporation-fission process of the compound nucleus is simulated in a Monte Carlo framework. Photofission reaction cross-sections are analyzed in a systematic manner in the energy range of ∼ 10-20 MeV for the actinides 232Th , 238U and 237Np . Photonuclear cross-sections for the medium-mass nuclei 63Cu and 64Zn , for which there are no fission events, are also presented. The study reproduces satisfactorily the available experimental data of photofission cross-sections at GDR energy region and the increasing trend of nuclear fissility with the fissility parameter Z 2/A for the actinides.

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Authors and Affiliations

  1. Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, 700 064, Kolkata, India

    Tapan Mukhopadhyay & D. N. Basu

Authors
  1. Tapan Mukhopadhyay
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  2. D. N. Basu
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Correspondence to D. N. Basu.

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Communicated by W. Nazarewicz

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Mukhopadhyay, T., Basu, D.N. Photonuclear reactions of actinides in the giant dipole resonance region. Eur. Phys. J. A 45, 121–124 (2010). https://doi.org/10.1140/epja/i2010-10993-y

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  • DOI: https://doi.org/10.1140/epja/i2010-10993-y

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