Current status of the AMS facility at the Tono Geoscience Center of the Japan Atomic Energy Agency

Kokubu, Yoko; Nishizawa, Akimitsu*; Suzuki, Mototaka*; Owaki, Yoshio*; Nishio, Tomohiro*; Matsubara, Akihiro; Saito, Tatsuo; Ishimaru, Tsuneari; Umeda, Koji; Hanaki, Tatsumi

Nuclear Instruments and Methods in Physics Research B, 294, p.43 - 45, 2013/01

https://doi.org/10.1016/j.nimb.2012.01.050

The Tono Geoscience center of JAEA installed the JAEA-AMS-TONO system at 1997. Since 1998, the system has routinely used for C-AMS. Recently, about 800 samples/y have been measured mainly for studies of neotectonics and hydrogeology in relation to research of geosphere stability for long-term Isolation of high-level radioactive waste. Under the common-use facility program, the system has also been used by researchers of universities and other institutes. In addition, Be-AMS has been developed for geochronological study. A gas ionisation detector was exchanged. As the detector has a gas absorber cell which has larger volume than the previous one, it is possible to remove B efficiently. Test measurement by using several standard samples supplied from University of California, Berkeley was performed. Ratios of Be/Be were comparable to the certified values, indicating that our system has sufficient ability to be useful to Be-AMS.

Current status of JAEA-AMS-TONO, the Japan Atomic Energy Agency

Matsubara, Akihiro; Kokubu, Yoko; Nishizawa, Akimitsu*; Owaki, Yoshio*; Nishio, Tomohiro*; Ishimaru, Tsuneari; Hanaki, Tatsumi

Proceedings of 4th East Asian Symposium on Accelerator Mass Spectrometry (EA-AMS-4), p.147 - 150, 2011/12

The JAEA-AMS-TONO at Tono Geoscience Center, Japan Atomic Energy Agency has provided rare isotope concentrations in sample materials for studies of geological environments of deep underground for development of the geological disposal of high-level radioactive waste. The core facility is a versatile AMS system based on National Electrostatics Corporation Moldel 15SDH-2 (5 MV) Pelletron Accelerator installed in 1997. This system was designed for the determination of the isotopic ratios of beryllium, carbon, aluminium, chlorine, etc. We have also developed Be-AMS in order to further expand the system utilization for applications such as estimation of the exposure age of basement rocks and the sedimentation rates. In this article, the current status of C-AMS and Be-AMS in the JAEA-AMS-TONO are described.

Present status of the JAEA-AMS-TONO; 2010

Ishimaru, Tsuneari; Kokubu, Yoko; Matsubara, Akihiro; Hanaki, Tatsumi; Yasue, Kenichi; Nishizawa, Akimitsu*; Suzuki, Mototaka*; Owaki, Yoshio*; Nishio, Tomohiro*

Dai-13-Kai AMS Shimpojiumu Hokokusho, p.11 - 14, 2011/01

no abstracts in English

None

Ishido, Akio*; Hasegawa, Ken*; Hanaki, Tatsumi*; Ochiai, Yoji*; Shigeta, Naotaka*; Nagasaki, Yasushi*

JNC TN7400 2005-022, 224 Pages, 1996/04

JNC-TN7400-2005-022.PDF:9.36MB

None

Geoscience studies using by AMS at JAEA-AMS-TONO in the Tono Geoscience Center of the Japan Atomic Energy Agency

Kokubu, Yoko; Matsubara, Akihiro; Hanaki, Tatsumi; Yasue, Kenichi; Umeda, Koji

no journal, , 

The JAEA-AMS-TONO facility was established in 1997 at the Tono Geoscience Center, Japan Atomic Energy Agency (JAEA). Our AMS system is a versatile system based on a 5MV tandem Pelletron type accelerator (National Electrostatic Corporation, US) and has been made available for C-, Be- and Al-AMSs. These multi-nuclide AMSs have been mainly applied to neotectonics and hydrogeology, in support of our research on geosphere stability applicable to the long-term isolation of high-level radioactive waste. Furthermore, the C- and Be-AMSs are used for geoscience, environmental science and archaeology by researchers of universities and other institutes under the JAEA's common-use facility program. In this presentation, we introduce dating of C and Be through our AMS to geoscience studies. Moreover we report development of Al-AMS.