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Description of the two-humped mass distribution of fission fragments of mercury isotopes on the basis of the multidimensional stochastic model

  • Nuclei
  • Theory
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Abstract

The dynamical model proposed earlier for describing fusion-fission reactions is applied to describing the two-humped mass distribution of fission fragments of mercury isotopes. In this model, the calculation of the time evolution of collective coordinates of the system is broken down into two stages. The first stage is that within which the projectile approaches the target nucleus, while the second is that of the evolution of the system formed after the touching of the projectile and target nuclei. The dynamical evolution of the system within both stages of the calculation is described on the basis of Langevin equations. The shell structure of colliding nuclei is taken into account at either stage of the calculation. Mass distributions are calculated for fragments originating from the fission of the mercury isotopes 190, 184Hg formed in the fusion-fission reactions 48Ca + 142Nd → 190Hg and 40Ar + 144Sm → 184Hg. The process in which the isotope 180Hg undergoes fission from the ground state is also calculated. The results obtained in this way are compared with the results of previous theoretical calculations and with available experimental data.

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Authors and Affiliations

  1. Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia

    V. L. Litnevsky & V. V. Pashkevich

  2. Omsk State University, pr. Mira 55a, Omsk, 644077, Russia

    G. I. Kosenko

  3. Omsk Branch, Military Academy of Logistics, Omsk, Russia

    G. I. Kosenko

  4. Institute for Nuclear Research, National Academy of Sciences of Ukraine, pr. Nauki 47, Kyiv, 03680, Ukraine

    F. A. Ivanyuk

Authors
  1. V. L. Litnevsky
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  2. G. I. Kosenko
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  3. F. A. Ivanyuk
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  4. V. V. Pashkevich
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Correspondence to V. L. Litnevsky.

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Original Russian Text © V.L. Litnevsky, G.I. Kosenko, F.A. Ivanyuk, V.V. Pashkevich, 2014, published in Yadernaya Fizika, 2014, Vol. 77, No. 2, pp. 190–197.

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Litnevsky, V.L., Kosenko, G.I., Ivanyuk, F.A. et al. Description of the two-humped mass distribution of fission fragments of mercury isotopes on the basis of the multidimensional stochastic model. Phys. Atom. Nuclei 77, 167–174 (2014). https://doi.org/10.1134/S1063778814010153

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  • DOI: https://doi.org/10.1134/S1063778814010153

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