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A New application technique of a position-sensitive liquid light guide Cerenkov counter for the simultaneous position detection of $$^{90}$$Sr/$$^{90}$$Y and $$^{137}$$Cs radioactivity

$$^{90}$$Sr/$$^{90}$$Yおよび$$^{137}$$Cs放射能同時位置検出を目指した位置敏感型液体ライトガイドチェレンコフカウンターの新しい応用技術

寺阪 祐太   ; 瓜谷 章*

Terasaka, Yuta; Uritani, Akira*

A new application of a position-sensitive liquid light guide Cerenkov counter for the simultaneous position detection of $$^{90}$$Sr/$$^{90}$$Y and $$^{137}$$Cs radioactivity in a gamma-ray-dominant environment is proposed. $$beta$$-emitting $$^{90}$$Sr/$$^{90}$$Y and $$gamma$$-emitting $$^{137}$$Cs radioactive point sources were measured using a position-sensitive liquid light guide based on the time-of-flight (TOF) method. We found a clear difference in the count rate ratio between the source position peak and reflection peak of the position histogram. Moreover, simultaneous measurements of the radioactive point sources were performed. The results suggest that the source position and activity of $$^{90}$$Sr/$$^{90}$$Y and $$^{137}$$Cs can be simultaneously determined based on the count rate ratio of the source position peak and the reflection peak.

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パーセンタイル:63.33

分野:Instruments & Instrumentation

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