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Report No.
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Sophistication $$^{14}$$C measurement at JAEA-AMS-MUTSU; Attempt on a small quantity of sample

Tanaka, Takayuki; Kabuto, Shoji; Kinoshita, Naoki; Yamamoto, Nobuo

In the investigations on substance dynamics using the molecular weight and chemical fractionation, the utilization of $$^{14}$$C measurement by an accelerator mass spectrometry (AMS) have started. As a result of the fractionation, sample contents required for AMS measurement have been downsized. We expect that this trend toward a small quantity of sample will be steadily accelerated in the future. As $$^{14}$$C measurement by AMS established at Mutsu office require about 2 mg of sample content at present, our AMS lags behind the others in the trend. We try to downsize the needed sample content for $$^{14}$$C measurement by our AMS. In this study, we modified the shape of the target-piece in which the sample is packed and which is regularly needed to radiocarbon measurement by our AMS. Moreover, we improved on the apparatus needed to pack the sample. As a result of the improvement, we revealed that it is possible to measure the $$^{14}$$C using our AMS even by the amount of the sample of about 0.5 mg.

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