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Radiat Prot Dosimetry. 2013 Sep;156(3):277-82. doi: 10.1093/rpd/nct079. Epub 2013 Apr 3.

Preparation of paper scintillator for detecting 3H contaminant.

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Radioisotope Research Center, The University of Tokushima, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan.


Liquid scintillator (LS)-encapsulated silica was prepared by the sol-gel method and then was added dropwise onto a wipe paper to form a paper scintillator. First, the efficiencies of wipe were determined for both the paper scintillator and the wipe paper using a liquid scintillation counter (LSC). The efficiencies of wipe using the paper scintillator and the wipe paper were 88 and 36 %, respectively. The detection efficiencies were 5.5 % for the paper scintillator, 46 % for the wipe paper using an LS and 0.08 % for the (3)H/(14)C survey meter, respectively, compared with that of a melt-on scintillator of 47 %. Second, an (3)H contaminant on the paper scintillator was successfully detected using a photomultiplier without an LSC or an (3)H/(14)C survey meter. Finally, the paper scintillator was able to detect beta rays of the (3)H contaminant easily without an LS.

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