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Report No.

Current status of JAEA-AMS-TONO in the 20th year

Kokubu, Yoko   ; Fujita, Natsuko  ; Miyake, Masayasu; Watanabe, Takahiro   ; Ishizaka, Chika; Okabe, Nobuaki; Ishimaru, Tsuneari ; Matsubara, Akihiro*; Nishizawa, Akimitsu*; Nishio, Tomohiro*; Kato, Motohisa*; Torazawa, Hitoshi*; Isozaki, Nobuhiro*

JAEA-AMS-TONO has been in operation at the Tono Geoscience Center, Japan Atomic Energy Agency since 1998 and 20 years have passed from the beginning of its utilization. The AMS system is a versatile system based on a 5 MV tandem Pelletron type accelerator. The system has been used to measure carbon-14 ($$^{14}$$C), beryllium-10 ($$^{10}$$Be) and aluminium-26 ($$^{26}$$Al). In addition, the development of measurement of iodine-129 ($$^{129}$$I) has been started. The main use is measurement of $$^{14}$$C in geological samples for dating studies in neotectonics and hydrogeology. In order to increase the speed of sample preparation, we introduced the automated graphitization equipment and made a gas-strip line to collect dissolved inorganic carbon in groundwater samples. Measurement of $$^{10}$$Be and $$^{26}$$Al has been used for geoscience studies and the detection limit in the measurement of $$^{10}$$Be was improved by $$^{7}$$Be-counting suppression. Recently tuning of measurement condition of $$^{129}$$I has been progressed.



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Category:Instruments & Instrumentation



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