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The Concentration Determination for High Atomic Number Elements by <gamma>-Ray Excited DX-Ray Spectrometry

Research Project

Project/Area Number 61460150
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 計測・制御工学
Research InstitutionToyohashi University of Technology

Principal Investigator

ENOMOTO Shigemasa  Professor, Faculty of Eng., Toyohashi University of Technology, 工学部, 教授 (00124727)

Co-Investigator(Kenkyū-buntansha) HIGASHIYAMA Yoshio  Lecturer, Faculty of Eng., Yamagata University, 工学部, 講師 (50144209)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 1987: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1986: ¥2,800,000 (Direct Cost: ¥2,800,000)
Keywordshigh atomic number element / concentration determination / Cs-137 <gamma>-ray source / fluorescent X-ray Compton scttering / high purity germanium semiconductor detector / 高純度ゲルマニウム半導体検出器 / 非分散分光測定 / γ線源 / 蛍光X線分析 / 高Z元素 / Ge半導体検出器 / KX線 / Compton / 散乱
Research Abstract

In order to determine the concentration of high Z elements, KX-ray fluorescence technique by using a Cs-137 <gamma>-ray source (half-life 30.17 years, 662 KeV <gamma>-ray) with non-dispersive spectrometry using a high pure germanium semiconguctor detector is investigated. It is possible with this technique to analyse the specimens enclosed in containers or pipe lines.
The Cs-137 <gamma>-ray has enough energy to excite the KX-rays of high Z elements, however considerable amount of Compton scattered <gamma>-rays in specimens is produced, and large ratio of the KX-rays to the scattered radiation from specimens is required to have sufficient accuracy. In this method, the scattered radiation should be reduced to improve the ratio by setting up the geometry between the source, specimen and X-ray detector.
The variation of specimen conditions such as density, particle size, matrix composition affect much on the characteristic calibration curves related to the concentration vs. KX-ray/Compton count ratio. The 300 second measurement allows the relative precision of less than 3% for powder, aqueous solution, and all alloy specimens containing more than a few wt% W, Pb or U.

Report

(3 results)
  • 1987 Annual Research Report   Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] 榎本茂正: RADIOSOTOPES.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] ENOMOTO,Shigemasa: "The K X-ray Fluorescence Spectrometry for High Atomic Number Elements by using Cs-137 <gamma>-Ray Source." RADIOISOTOPES.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 榎本茂正: RADIOISOTOPES.

    • Related Report
      1987 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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