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Study of Gamma Rays Penetration through Material

Research Project

Project/Area Number 60580173
Research Category

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

Allocation TypeSingle-year Grants
Research Field Nuclear engineering
Research InstitutionResearch Laboratory for Nuclear Reactors Tokyo Institute of Technology

Principal Investigator

HARIMA Yoshiko  Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Research Associate, 原子炉工学研究所, 助手 (90016858)

Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1986: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1985: ¥800,000 (Direct Cost: ¥800,000)
KeywordsGamma-ray / Point isotropic source buildup factor / Energy spector / Beryllium / Shield-tissue / Discrete ordinates method / Monte Carlo method / G-P法
Research Abstract

Although the basic physical principles governing transport of photons were known many decades previously, it was only through the use of computers that these principles could by applied to photon shielding with high accuracy. Satisfactory computational methods for analysing radiation transport is still developing. The purpose of this study is to show the state of present art making photon transport calculations for low Z materials and for low source energies.
These are two representative discrete ordinates codes, the PALLAS and ANISN, using different approximating techniques, which are designed to solve the deep penetration problem with techniques for handling an isotropic scattering. As a typical example, buildup factors and energy spectra for beryllium were calculated by two calculation codes, and were compared with those of the point Monte Carlo method code, EGS4. These calculated results were in a good agreement up to 10 mfp with one another. The results of the PALLAS and ANISN calculations were within 40 % up to 40 mfp.
Gamma ray transport in iron-or lead-tissue system was calculated with the PALLAS code. Buildup factors and energy spectra at the interface and in tissue show significantly different from those of infinite medium.
An American Nuclear Society Standards Committee Working Group, identified as ANS-6.4.3, is developing a set of evaluated gamma-ray isotropic point-source buildup factors and attenuation coefficients for a standard reference data base. In June 1985, the head investigator was asked to become a member of Working Group ANS-6.4.3. Above results are expected to be adopted as a part of standard reference data.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] Yoshiko HARIMA: JAERI-M 86-071. 71. 1-67 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Y.Harima: Nuclear Science and Engineering. 94. 24-35 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] ORNL: RSIC Newsletter. 260. 1 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] ORNL: RSIC Newsletter. 260. 2 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] D.K.Trubey: Transactions of the American Nuclear Society. 53. 416-418 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] D.K.Trubey: American Nuclear Society Topical Conference on"Theory and Practices in Radiation Protection and Shielding",Knoxville,Tennessee. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Yukio SAKAMOTO: JAERI-M 87-. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Yoshiko Harima: Nuclear Science and Engineering. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 播磨良子: 日本原子力学会年会要旨集. 【I】. 117 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 坂本幸夫: 日本原子力学会秋の分科会予稿集. 【I】. 303 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 藤田徹: 日本原子力学会秋の分科会予稿集. 【I】. 304 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 松本誠弘: 日本原子力学会秋の分科会予稿集. 【I】. 305 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 播磨良子: 日本原子力学会年会要旨集. 【I】. 367 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 坂本幸夫: 日本原子力学会年会要旨集. 【I】. 368 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 石川敏夫: 日本原子力学会秋の分科会予稿集. 【I】. 68 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 播磨良子: 日本原子力学会秋の分科会予稿集. 【I】. 69 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Yoshiko HARIMA: "Applicability of Geometrical Progression Approximation (G-P method) of Gamma-Ray Buildup Factors" JAERI-M 86-071. 71. 1-67 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Y. Harima: "Validity of the Geometric-Progression Formula in Approximating Gamma-Ray Buildup Factors" Nculear Science and Engineering. 94. 24-35 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] ORNL: "CCC-493/QAD-CGGP" RSIC Newsletter. 260. 1 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] ORNL: "CCC-494/G33-GP" RSIC Newsletter. 260. 2 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] D. K. Trubey: "New Buildup Factor Data for Point Kernel Calculations" Transactions of the American Nuclear Society. 53. 416-418 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] D. K. Trubey: "New Buildup Factor Data for Point Kernel Calculations" "American Nuclear Society Topical Conference on "Theory and Practices in Radiation Protection and Shielding , Knoxville, Tennessee. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Yukio SAKAMOTO: "Data Library of Gamma-Ray Buildup Factors for Point Isotropic Source-Molybdenum, Tin, Lanthanum, Gadolinium, Tungsten, Lead, and Uranium" JAERI-M 87-. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Yoshiko Harima: "A Comparison of Gamma-Ray Buildup Factors, for Low Z Material and for Low Energies Using Discrete Ordinates and Point Monte Carlo Methods" Nuclear Science and Engineering. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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

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