LSCによる廃棄物ゼロ測定法：プラスチックシンチレータの表面改質効果

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タイトル別名
  • No-waste-measurement Method with a LSC: Effects of Surface Treatment for Plastic Scintillator
  • LSC ニ ヨル ハイキブツ ゼロ ソクテイホウ : プラスチックシンチレータ ノ ヒョウメン カイシツ コウカ

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抄録

Plastic scintillator (PS) sheets were treated with dielectric barrier discharge plasma (DBD) or by fluorine gas (F-gas) to become its surface hydrophilicity. A hydrophobic PS-sheet changed by these treatments and contact area of sample solution became wide, so measurement efficiency of beta-rays became higher than before treatment. Surface treatment was effective, especially for low energy beta-rays. Average measurement efficiency was approx. 35% for 5 μL tritium samples with 1 min. plasma treatment, and count rate showed good linearity with activity (Bq) from 2 to 400 Bq/5 μL. Little radioactive waste was generated by the PS-sheets method because the PS-sheets were measured by a conventional liquid scintillation counter (LSC) without liquid scintillator and they were possible to reuse by simple rinsing. Also unquenching spectra was gotten by the PS-sheets. The PS-sheets method is possible both of qualitative and quantitative analysis without radioactive wastes.

収録刊行物

  • 保健物理

    保健物理 50 (2), 119-127, 2015

    日本保健物理学会

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