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Measurement and Analysis of Neutrons Emitted from Fission of Transuranium Nuclides

Research Project

Project/Area Number 07458103
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field エネルギー学一般・原子力学
Research InstitutionKyoto University

Principal Investigator

KIMURA Itsuro  Kyoto University, Department of Nuclear Engineering, Professor, 工学研究科, 教授 (40027404)

Co-Investigator(Kenkyū-buntansha) KANAZAWA Satoshi  Kyoto University, Department of Nuclear Engineering, Instructor, 工学研究科, 助手 (60089125)
KANNO Ikuo  Kyoto University, Department of Nuclear Engineering, Lecturer, 工学研究科, 講師 (50234167)
KOBAYASHI Katsuhei  Kyoto University, Research Reactor Institute, Associated Professor, 原子炉実験所, 助教授 (80027466)
NAKAGOME Yoshihiro  Kyoto University, Research Reactor Institute, Associated Professor, 原子炉実験所, 助教授 (50027455)
OHSAWA Takaaki  Kinki University, Atomic Energy Research Institute, Professor, 原子力研究所, 教授 (10038028)
Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 1997: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1996: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1995: ¥3,900,000 (Direct Cost: ¥3,900,000)
KeywordsTransuranium nuclides / Nuclear fission / Fission fragment / Fission nuetrons / U-235 / U-233 / Pu-239 / Delayd neutrons / ウラン233 / アメリシウム242m / 超ウラン核種 / レベル密度パラメータ / マルチモード核分裂 / プルトニウム239 / アバランシェカウンタ
Research Abstract

1.Average number of the prompt neutrons per a thermal neutron fission of Pu-239 was obtained as a function of fragment mass number by means of simultaneous measurement of velocities and energies of two fission fragments. The result agreed with the predicated value by using the Brosa's multimode fission model.
2.A new simultaneous measurement system of fission fragments and prompt neutrons was designed and completed. Its characteristics were obtained.
3.By making use of a supermirror neutron guide tube of Kyoto University Reactor (KUR), a fission chamber with a thin sample layr and the system described above, the mass and the energy of fission fragments and the number and the energy of prompt neutrons for U-235 and U-233 were measured. By using the experimental results, the division of mass and energy in the fission process was investigated. In addition to this, the level density parameters for fission fragment nuclides were obtained by the results.
4.A new computer program system for the calculation of prompt fission neutron spectra, and those for Np-237, Cm-242, -243, -244, -246, -248 were obtained by this system.
5.The Brosa's multimode fission model was applied to calculate the prompt fission neutron spectra. The obtained spectrum of the fast neutron fission of Np-237 satisfactorily agreed with the measured.
6.By using Moriyama's formula and some experimental data, the systematics of delayd neutron yield of actinoide nuclides were investigated and applied to explain the reason of their decrement for higher actinoids.

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (34 results)

All Other

All Publications (34 results)

  • [Publications] K.Nishio: "Multiplicity and Energy of Neutrons from ^<235>U(n,f) Fission Fragment" Nuclear Physics. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 木村 逸郎: "核分裂の実験的研究の現状" 日本原子力学会誌. 39・9. 733-738 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Nishio: "Measurement of Level Density Paramenters of Fission Fragments Following Thermal Neutron Induced Fission of U-235" Journal of Nuclear Science and Technology. 34・5. 439-444 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Nishio: "A System for Correlation Measurement of Fission Fragments and Prompt Neutrons for Thermal Neutron Induced Fission" Nuclear Instruments and Method. A385. 171-178 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Nishio: "Measurement of Fragment Mass Dependent Kinetic Energy and Neutron Multiplicity for Thermal Induced Fission of Pu-239" Journal of Nuclear Science and Technology. 32. 404-414 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Ohsawa: "Multimodal Analysis of Fission Neutron Spectra" Proc.International Conf.on Nuclear Data. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Ohsawa: "Systematics in Delayed Neutron Yields" JAERI-Conf. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Ohsawa: "Systemtatics of Prompt Neutron Spectra for Heavy Nuclides" Proc.9th International Conf.on Reactor Dosimetry. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Ohsawa: "Calculation of Prompt Neutron Spectra for Cm Isotopes" JAERI-Conf97-005. 228-233 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Nishio, Y.Nakagome, I.Kimura, et al.: "Multiplicity and Energy of Neutrons from ^<235>U (n, f) Fission Fragment" Nuclear Physics.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Nishio, I.Kanno, I.Kimura, Y.Nakagome, et al.: "Measurement of Level Density Paramenters of Fission Fragments Following Thermal Neutron Induced Fission of U-235" Journal of Nuclear Science and Technology. 34・5. 439-444 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Nishio, I.Kanno, I.Kimura, Y.Nakagome, et al.: "A System for Crrelation Measurement of Fission Fragments and Prompt Neutrons for Thermal Neutron Induced Fission" Nuclear Instruments and Method. A385. 171-178 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Nishio, Y.Nakagome, I.Kanno, I.Kumura: "Measurement of Fragment Mass Dependent Kinetic Energy and Neutron Multiplicity for Thermal Induced Fission of Pu-239" Jouranal of Nuclear Science and Technology. 32. 404-414 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Ohsawa, et al.: "Multimodal Analysis of Fission Neutron Spectra" Proc.International Conf.on Nuclear Data.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Ohsawa: "Systematics in Delayd Neutron Yields" JAERI-Conf.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Ohsawa, et al.: "Systemtatics of Prompt Neutron Spectra for Heavy Nuclides" Proc.9th International conf.on Reactor Dosimetry.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Ohsawa: "Calculation of Prompt Neutron Spectra for Cm Isotopes" JAERI-Conf97-005. 228-233 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Nishio: "Multiplicity and Energy of Neutrons from ^<235>U (n,f) Fission Fragment" Nuclear Physics. (印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] 木村逸郎: "核分裂の実験的研究の現状" 日本原子力学会誌. 39・9. 733-738 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Nishio: "Measurement of Level Density Paramenters of Fission Fragments Following Thermal Neutron Induced Fission of U-235" Journal of Nuclear Science and Technology. 34・5. 439-444 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Nishio: "A System for Correlation Measurement of Fission Fragments and Prompt Neutrons for Thermal Neutron Induced Fission" Nuclear Instruments and Method. A385. 171-178 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Ohsawa: "Multimodal Analysis of Fission Neutron Spectra" Proc.International Conf.on Nuclear Data. (印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Ohsawa: "Systematics in Delayed Neutron Yields" JAERI-Conf. (印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Ohsawa: "Systemtatics of Prompt Neutron Spectra for Heavy Nuclides" Proc.9th International Conf.on Reactor Dosimetry. (印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Ohsawa: "Calculation of Prompt Neutron Spectra for Cm Isotopes" JAERI-Conf97-005. 228-233 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Nishio: "A System for Correlation Measurement of Fission Fragments and Prompt Neutrons for Thermal Neutron Induced Fission" Nuclear Instruments and Methods in Phys.Res.A385. 171-178 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] I.Kimura: "Standard and Reference Neutron Spectrum Fields inside and beside Research Reactors" Proc.5-th Asian Symposium on Research Reactors. (発表予定).

    • Related Report
      1996 Annual Research Report
  • [Publications] I.Kimura: "Possibility of Transmutation of Long-lived Nuclides in Radioactive Waste from Nuclear Power Stations" Proc.XII Intern.School on Nucl.Phys.,Neutron Phys.and Nuclear Energy. (発表予定).

    • Related Report
      1996 Annual Research Report
  • [Publications] S.Yamamoto: "Application of BGO Scintillators to Absolute Measurement of Neutron Capture Cross Sections between 0.01 eV and 10 eV" J.Nuclear Science and Technology. 33・11. 815-820 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Kobayashi: "Characterisics of Kyoto University Lead Slowing-down Spectrometer (KULS) Coupled to an Electron Linac" Nuclear Instruments and MethodsPhys.Res.A385. 145-156 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Kobayashi: "Fission Cross Section Measurements of Am-241 between 0.1 eV and 10 ke V with Lead Slowing-down Spectrometer and at Thermal Neutron Energy" Nuclear Science and Engineering. (発表予定).

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Ohsawa: "Systematic Evaluation of Fission Neutron Spectra for Heavy Nuclides" Proc.of 9-th International Symp.on Reactor Dosimetry. (発表予定).

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Ohsawa: "Calculation of Prompt Neutron Spectra for Curium Isotopes" Proc.of 1996 Symposium on Nuclear Data. (発表予定).

    • Related Report
      1996 Annual Research Report
  • [Publications] I. Kimura: "Mcasurement of Fragment Mass Dependent Kinetic Energy and Neutron Multiplicity for Thermal Neutron Induced Fission of Plutonium-239" J. Nucl. Sci. and Technol.32. 404-414 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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