Simultaneous Measurement of Prompt Neutrons and Fission Fragments for ^<239>Pu(n_<th>, f)

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概要

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• The multiplicity and energy of the prompt neutrons emitted from the fission fragments for 239Pu(nth, f) were measured as functions of the fragment mass and total kinetic energy. The results were compared with those for 233U(nth, f) and with the predicted values by the multi-channel fission theory with the random neck rupture model.The measured and predicted values of the neutron multiplicity, 〈ν〉(m∗), show the saw-tooth trend and agree with each other. The total neutron multiplicity decreases linearly with increasing total kinetic energy resulting in −d〈TKE〉/d〈νtot〉=16.5±0.4 MeV/neutron. The slope of the neutron multiplicity vs. the total kinetic energy, −d〈ν〉/d〈TKE〉, was plotted against the fragment mass. Its shape agrees with that for 233U(nth, f). The average neutron emission energy, 〈η〉(m∗), follows a bell shape about the symmetric fission accompanying higher values for very asymmetric fissions and agrees with that for 233U(nth, f). The total excitation energy 〈TXE〉(m∗) was determined by two manners: (1) neutron data and (2) Qmax−〈TKE〉. Both results satisfactorily agree with each other as the case of 233U(nth, f), and thereby the present derivation of 〈TKE〉 from the neutron data is confirned.

• 社団法人 日本原子力学会の論文
• 2000-11-25

著者

• 木村 逸郎

  京都大学

• Kanno Ikuo

  Department Of Nuclear Engineering Kyoto University

• TSUCHIYA Chikafumi

  Department of Nuclear Engineering, Kyoto University

• NAKAGOME Yoshihiro

  Research Reactor Institute, Kyoto University

• YAMANA Hajimu

  Research Reactor Institute, Kyoto University

• MORIYAMA Hirotake

  Research Reactor Institute, Kyoto University

• NISHIO Katsuhisa

  Japan Atomic Energy Research Institute

• SHIN Kazuo

  Department of Nuclear Engineering, Kyoto University

• KIMURA Itsuro

  Institute of Nuclear Technology, Institute of Nuclear Safety Systems, Inc.

• Kimura Itsuro

  Institute Of Nuclear Safety System

• Shin Kazuo

  Department Of Applied Chemistry Osaka Prefecture University

• Yamana Hajimu

  Research Reactor Institute Kyoto University

• Moriyama Hirotake

  Research Reactor Institute Kyoto University

• 木村 逸郎

  大阪科学技術センター

• Nakagome Y

  Research Reactor Institute Kyoto University

• Nakagome Yoshihiro

  Research Reactor Institute Kyoto University

• Tsuchiya Chikafumi

  Department Of Nuclear Engineering Kyoto University

• Nishio Katsuhisa

  Japan Atomic Energy Agency (JAEA), 2-4 Shirane, Tokai, Ibaraki 319-1195, Japan

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