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Moriya, Koichi; Koarashi, Jun; Atarashi-Andoh, Mariko; Moriizumi, Jun*; Yamazawa, Hiromi*; Hirai, Keizo*
no journal, ,
no abstracts in English
Koarashi, Jun; Atarashi-Andoh, Mariko; Ishizuka, Shigehiro*; Kadono, Atsunobu*; Moriya, Koichi*; Nakanishi, Takahiro
no journal, ,
no abstracts in English
Sakamoto, Ai; Tanaka, Takayuki; Otosaka, Shigeyoshi
no journal, ,
no abstracts in English
Ishimaru, Tsuneari; Kokubu, Yoko; Matsubara, Akihiro; Yasue, Kenichi; Doke, Ryosuke; Nishizawa, Akimitsu*; Owaki, Yoshio*; Nishio, Tomohiro*
no journal, ,
The Japan Atomic Energy Agency (JAEA) installed the JAEA-AMS-TONO system in 1997 at Tono Geoscience Center. The system has routinely been used for 
C-AMS and has been developed for use in 
Be-AMS. Under the common-use facility program of JAEA, the system has also been available and used by researchers from universities and other institutes. In this presentation, we report current status of the system and the application studies. In fiscal year 2010, machine time for the Be-AMS was increased because we kicked into gear to technology development of the Be-AMS. For the C-AMS, 520 samples were measured and 87 of the samples were measured upon requests of 4 studies under the common-use facility program. The JAEA applied this C-AMS to geochronological studies such as estimation of sedimentation rate of soil and of retention time of ground water for research and development related to the geological disposal of high-level radioactive waste.
Matsubara, Akihiro; Nishizawa, Akimitsu*; Kokubu, Yoko; Ishimaru, Tsuneari
no journal, ,
no abstracts in English
Kabuto, Shoji; Kinoshita, Naoki; Tanaka, Takayuki; Kuwabara, Jun; Seki, Takeo
no journal, ,
A Tandetron Accelerator Mass Spectrometer (AMS) manufactured by High Voltage Engineering Europa in Netherlands had been set up at the Mutsu Office of Aomori Research and Development Center, Japan Atomic Energy Agency (JAEA) in 1997. This AMS is routinely measurements of the isotopic ratio of carbon (C/
C) and iodine (
I/
I). Although the East Japan Earthquake occurred during Accelerator Tank maintenance in March 2011, AMS was fortunately safe. In this report, the summary of the current operational status at 2010-2011, the future plans and the problem are described.
Kuwabara, Jun; Tanaka, Takayuki; Kabuto, Shoji; Kinoshita, Naoki; Seki, Takeo
no journal, ,
Increase of the measurement of I/I isotope ratio in various environmental samples using accelerator mass spectrometer (JAEA-AMS-MUTSU) established by the Aomori Research and Development Center JAEA is expected for the purpose of investigating distribution of the iodine isotopes in environment with the release of radioactive materials by the Fukushima first Nuclear Power Plant accident. Background level of JAEA-AMS-MUTSU in iodine measurement was examined by measuring AgI crystal of iodargyrite. Approximately 11 counts per 60 minutes of the I background existed under the condition that there was not iodine in a sample. To reduce the memory effect in the measurement of the sample which has high isotope ratio, establishment of limit of the total counts was considered. The result of a measurement was hardly affected even if the limit of the total counts was made.