Determination of Boron Content in Volcanic Rocks by Using Neutron-induced Prompt .GAMMA.-Ray. Correction of Count Rate Fluctuation Using Silicon Internal Standard.

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  • SANO Takashi
    Faculty of Integrated Human Studies, Kyoto University Institute for Geothermal Sciences, Graduate School of Science, Kyoto University
  • FUKUOKA Takaaki
    Faculty of Science, Gakushuin University Faculty of Geo-enviromental Science, Rissho University
  • HASENAKA Toshiaki
    Faculty of Science, Tohoku University
  • YONEZAWA Chushiro
    Tokai Establishment, Japan Atomic Energy Research Institute
  • MATSUE Hideaki
    Tokai Establishment, Japan Atomic Energy Research Institute
  • SAWAHATA Hiroyuki
    Tokai Establishment, Research Center for Nuclear Science and Technology, University of Tokyo

Bibliographic Information

Other Title
  • 即発γ線による火山岩中ホウ素の分析　　ケイ素を用いた内部標準法
  • ソクハツ ガンマセン ニ ヨル カザンガン チュウ ホウソ ノ ブンセキ ケイ
  • —Correction of Count Rate Fluctuation Using Silicon Internal Standard—
  • ―ケイ素を用いた内部標準法―

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Description

We improved procedures to analyze boron contents in volcanic rocks by using neutroninduced prompt γ-ray. The improvements include: (1) calculation of boron peak area only for the high energy half portion to avoid sodium peak overlap effect, (2) increase of sample weight by using pressed powdered pellets to save irradiation time, and (3) correction of count rate fluctuations and effect of sample geometry using silicon as an internal standard. Precisions of the 3-4 determinations of boron in GSJ (Geological Survey of Japan) volcanic standard rocks were less than 9 %. Our boron analyses agree well with the recommended values.

Journal

  • RADIOISOTOPES

    RADIOISOTOPES 47 (10), 735-744, 1998

    Japan Radioisotope Association

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