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Journal Articles

Development of fundamental technology for $$^{10}$$Be measurement in the JAEA-AMS-TONO

Matsubara, Akihiro; Nishizawa, Akimitsu*; Suzuki, Mototaka*; Kokubu, Yoko; Ishimaru, Tsuneari; Hanaki, Tatsumi

Dai-13-Kai AMS Shimpojiumu Hokokusho, p.120 - 123, 2011/01

In Tono Geoscience Center, $$^{10}$$Be measurement has been developed for geochronological study such as estimation of sedimentation rate and exposure age of rocks by using 15SDH-2 Pelletron accelerator (NEC, US). Fundamental technology for $$^{10}$$Be measurement has been developed through buildup of test measurements to optimize the parameter of the gas discharge box. We will present typical results obtained by test measurements with both standard samples having different values of $$^{10}$$Be/$$^{9}$$Be ratio and unknown samples.

Journal Articles

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

Journal Articles

Surface concentrations of $$^{129}$$I around the subarctic front in the Japan Sea

Suzuki, Takashi; Otosaka, Shigeyoshi; Togawa, Orihiko

Dai-13-Kai AMS Shimpojiumu Hokokusho, p.69 - 72, 2011/01

no abstracts in English

Journal Articles

Status of JAEA-AMS-MUTSU

Tanaka, Takayuki; Kabuto, Shoji; Kinoshita, Naoki; Suzuki, Takashi; Kuwabara, Jun; Seki, Takeo

Dai-13-Kai AMS Shimpojiumu Hokokusho, p.129 - 132, 2011/01

An accelerator mass spectrometry at Aomori Research and Development Center, JAEA (JAEA-AMS-MUTSU) was established in 1997 and the routine operation of $$^{14}$$C and $$^{129}$$I measurement was started from 1999 and 2003, respectively. This AMS has adopted the open door policy for the general users from the fiscal year of 2006 and various researches have been in progress by many users. In this presentation, we introduce the status of JAEA-AMS-MUTSU. The total number of measurements has increased well for five years after the open door policy excluding in 2008. The reasons for the decrease in 2008 were that we had stopped the operation of AMS for about one and half months because the operation system of AMS was upgraded, and that we could not measure the $$^{14}$$C for several months because the amplifier of detector had broken. We had resolved this trouble and our AMS can measure smoothly both $$^{14}$$C and $$^{129}$$I.

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