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Primary fragment mass-yield distributions for asymmetric fission path of heavy nuclei

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Abstract

The primary fragment mass-yield distribution for the asymmetric fission path in heavy nuclei, 233Pa, 239Np, 245Am and 249Bk at the excitation energy of ~20 MeV are experimentally constructed based on the intensities of total kinetic energies for individual mass splits. The results revealed an interesting phenomenon: in all the studied fissioning systems, the inner wings of the mass-yield distributions in the asymmetric fission path appear along the same mass-wall of A = 130 fragment mass. The asymmetric mass-yield distribution indicates the strong effect of structural shells in fragments on the final mass division process of the asymmetric fission path.

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Authors and Affiliations

  1. Institute of High Energy Physics, Chinese Academy of Science, Beijing, 100039, P.R. China

    Y. L. Zhao

  2. Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319-1195, Japan

    I. Nishinaka

  3. Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki, 319-1195, Japan

    Y. Nagame & K. Tsukada

  4. Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo, 192-0397, Japan

    K. Sueki

  5. Department of Chemistry, Faculty of Science, Niigata University, Niigata, 950-2181, Japan

    S. Goto

  6. Department of Chemistry, University of Tokyo, Tokyo, 113-8657, Japan

    M. Tanikawa

  7. Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo, 192-0397, Japan

    H. Nakahara

Authors
  1. Y. L. Zhao
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  2. I. Nishinaka
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  3. Y. Nagame
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  4. K. Tsukada
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  7. M. Tanikawa
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  8. H. Nakahara
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Zhao, Y.L., Nishinaka, I., Nagame, Y. et al. Primary fragment mass-yield distributions for asymmetric fission path of heavy nuclei. Journal of Radioanalytical and Nuclear Chemistry 255, 67–72 (2003). https://doi.org/10.1023/A:1022219512380

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