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Investigation of impurity motions with neutron resonance absorption method

Research Project

Project/Area Number 09440124
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅰ(光物性・半導体・誘電体)
Research InstitutionHigh Energy Accelerator Research Organization

Principal Investigator

IKEDA Susumu  Institute of Materials Structure Science, Professor, 物質構造科学研究所, 教授 (80132679)

Co-Investigator(Kenkyū-buntansha) MUTO Takeshi  Institute of Materials Structure Science, Research Associate, 物質構造科学研究所, 助手 (90249904)
OTOMO Tomoya  Institute of Materials Structure Science, Research Associate, 物質構造科学研究所, 助手 (90270397)
KIYANAGI Yoshiaki  Hokkaido University, Faculty of Engineering, Professor, 工学部, 教授 (80002202)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥13,900,000 (Direct Cost: ¥13,900,000)
Fiscal Year 1999: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1998: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1997: ¥7,900,000 (Direct Cost: ¥7,900,000)
KeywordsNeutron / Neutron resonance / Debye Temperature / Effective Temperature / TaS2 / Agl / 中性子線源 / 共鳴吸収 / 温度測定 / 微量分析
Research Abstract

Intense pulsed spallation neutron sources can provide a useful eV neutron flux in the energy range 1-100 eV, and made a neutron resonance absorption method possible. Many heavy atoms, such as Au, Ag, Ta, U, Sb, Ba and Ho, have large neutron absorption cross-sections of (n, γ) reaction at the characteristic energies in the energy range 1 - 100 eV. By measuring the neutron spectrum of absorption, one can generally know the kind of nucleus and the motion in samples. Therefore, it has been expected that this new method become very useful in the wide research field such as impurity researches and non-destructive inspection.
A new neutron resonance absorption spectrometer EZO was realized in the neutron scattering facility in National Laboratory for High Energy Physics, Japan. With this spectrometer, we succeeded to measure both the angular dependence and temperature dependence of effective temperatures (TィイD2effィエD2) of Ta-atom in the layer compound TaS2, and to discuss the partial phonon desity of states of Ta-atom in TaS2.
We also succeeded to measure TィイD2effィエD2's of Ag-atom and I-atom in an ionic conductor AgI, respectively, and found that the Debye temperature of Ag-atom changes from TィイD2effィエD2 = 160 K to TィイD2effィエD2 = 440 K around T= 150 K, while any change cannot be seen for I-atom. Further, this method were, for the first time, applied on the study of impurity in a si-semiconductor (including impurity Sb). In this work, the concentration of the impurity Sb in the Si-semiconductor was determined to be 1.84x10ィイD118ィエD1 atoms/cmィイD13ィエD1. This is in good agreement to the result of the chemical analysis. 1.8x10ィイD118ィエD1. The TィイD2effィエD2 of the impurity Sb was almost identical to that of the Sb-sample.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] K. Kaneko et. al: "Neutron resonance absorption spectroscopy on jonic conductor AgI"Journal of Physics and Chemistry of Solids. 60. 1499-1502 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Tokuda et. al.: "Direct Observation of Effective Temperature of Ta Atom in Layer Compound TaS_2 by Neutron Resonance Absorption Spectrometer"J. Phys. Soc. Jpn.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Kaneko, T.Kamiyama, Y.Kiyanagi, T.Sakuma and S.Ikeda: ""Neutron resonance absorption spectroscopy on ionic conductor AgI""J. Phys. Chem. Of Solids. 60. 1499-1502 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Tokuda, T.Kamiyama, Y.Kiyanagi, R.Moreh and S.Ikeda: ""Direct Observation of Effective Temperature of Ta atom in Layer Compound TaS2 by Neutron Resonance Absorption Spectrometer""J. Phys. Soc. Jpn..

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Kaneko, T. Kamiyama, Y. Kiyanagi, T. Sakuma, S. Ikeda: "Neutron resonance absorption spectroscopy on ionic conductor AgI"Journal of Physics and Chemistry of Solids 60. 60. 1499-1502 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Kaneko et al.: "Neutron Resonance Absorption Spectroscopy on Ionic Conductor AgI" J.Ehyo.and chem of Solid. (in press). (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1997-04-01   Modified: 2020-05-15  

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