Measurement of Level Density Parameters of Fission Fragments Following Thermal Neutron Induced Fission of Uranium-235

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Level density parameters of fission fragments following the thermal neutron induced fission of <SUP>235</SUP>U were determined as a function of the fragment mass by measuring the energy and multiplicity of prompt neutrons from a specified mass. This measurement gave the absolute values of the parameters for the neutron-rich nuclei covering the mass range from 80 to 155u except the region from 115 to 125u. The obtained parameters showed a saw-tooth trend against the mass with the minimum value around the double magic number, 132u, and this trend was close to that for <SUP>252</SUP>Cf(s.f) by Budtz-Jorgensen et al. The analysis by a phenomenological description of the level density parameters including the shell and collective effects suggested the existence of a collective motion of the fission fragment at the moment of prompt neutron emission.

収録刊行物

  • Journal of nuclear science and technology

    Journal of nuclear science and technology 34(5), 439-444, 1997-05-25

    Atomic Energy Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002077063
  • NII書誌ID(NCID)
    AA00703720
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00223131
  • NDL 記事登録ID
    4219690
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z53-A460
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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