Measurement of tritium with plastic scintillators in large vials of a low background liquid scintillation counter: an organic waste-less method |
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Authors: | Furuta Etsuko Kato Yuka Fujisawa Shinji |
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Institution: | 1.Ochanomizu University, 2-1-1 Otsuka Bunkyo-ku, Tokyo, 112-8610, Japan ;2.Hitachi Ltd., 6-22-1 Mure Mitaka-shi, Tokyo, 181-8622, Japan ; |
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Abstract: | The tritium compounds, tritiated water as a volatile compound and 3H-methionine as a non-volatile compound, were measured with two types of plastic scintillators (PSs) using a low background liquid scintillation counter (LSC). It is advantage that minimal organic waste is generated when a plastic scintillator is used for LSC measurement. The effect of large vials on counting efficiency, plasma effects with three types of plasma devices for PS-sheets, the effect of UV-light on PS-pellets, the relationship between the activity and the count rate, and the detection limits of tritium were studied with respect to the development of large-scale measurement systems. |
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