title: Measurement of tritium with high efficiency by using liquid scintillation counter with plastic scintillator.
abstract: The detection efficiencies of tritium samples by using liquid scintillation counter with hydrophilic plastic scintillator (PS) was approximately 48% when the sample of 20 μL was held between 2 PS sheets treated by plasma. The activity and count rates showed a good relationship between 400 Bq to 410 KBq mL(-1). The calculated detection limit of 2 min measurement by the PS was 13 Bq mL(-1) when a confidence was 95%. The plasma method for PS produces no radioactive waste.
authors.affiliation: Ochanomizu University, Graduate School, 2-1-1 Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan.
authors.forename: Etsuko
authors.initials: E
authors.lastname: Furuta
authors.affiliation: Department of Electrical and Electronic Engineering, Tokai University, Japan.
authors.forename: Ryu-ichiro
authors.initials: R
authors.lastname: Ohyama
authors.affiliation: Tokai University, Radioisotope Center, Japan.
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Yokota
authors.affiliation: Department of Electrical and Electronic Engineering, Tokai University, Japan.
authors.forename: Toshiya
authors.initials: T
authors.lastname: Nakajo
authors.affiliation: Department of Electrical and Electronic Engineering, Tokai University, Japan.
authors.forename: Yuka
authors.initials: Y
authors.lastname: Yamada
authors.affiliation: National Institute for Fusion Science, Japan.
authors.forename: Takao
authors.initials: T
authors.lastname: Kawano
authors.affiliation: National Institute for Fusion Science, Japan.
authors.forename: Tatsuhiko
authors.initials: T
authors.lastname: Uda
authors.affiliation: Crystals Division, Saint-Gobain, Japan.
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Watanabe
keywords: Atmospheric pressure glow plasma processing; Liquid scintillation counter; No radioactive waste fluid; Plastic scintillator; Surface treatment; Tritium