Present Status of the YU-AMS System, Yamagata University

Abstract

A new compact accelerator mass spectrometry (AMS) system has been installed in the Kaminoyama Research Institute at Yamagata University (YU). The AMS system is based on a 0.5MV Pelletron accelerator developed by the National Electrostatics Corporation. An automated acid-alkali-acid (AAA) treatment system and an automated graphitization line were also installed in the same facility for sample preparation. Performance tests of the YU-AMS system were carried out by measuring the C-series standard samples (C1-C8) and HOxII provided by IAEA and NIST, respectively. We evaluated the YU-AMS system by comparing the radiocarbon ages of Japanese tree rings with dendrochronologically determined calendar ages with calibration data. We also carried out some performance tests using a control serum and a 14 C-labeled drug (oxaliplatin).

Automated Sample Combustion and CO2 Collection System with IRMS for 14C AMS in Yamagata University, Japan

“…Table 2 shows the measurement results of the IAEA C series standard obtained by a batch method and the automated system. Since these results mostly agree with the consensus value, the measurement that uses the C series has been performed periodically and the result has been reported by Tokanai et al (2013). Although the reason for the deviation of the values of C2, C4, and C7 from the consensus value in Table 2 is unknown, the agreement between the measured values and recommended values over a long period of time (Tokanai et al 2013) confirms the validity of sample production using the automated system presented.…”