Status of the AMS system at Yamagata University

Toru Moriya, Mirei Takeyama, Hirohisa Sakurai, Toyoharu Umebayashi, Teiko Toyoguchi, Tadashi Shiraishi, Hiroko Miyahara, Motonari Ohyama, Kohei Nozawa, Satoshi Ito, Shigeru Itoh, Masashi Hirota, Fuyuki Tokanai

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


An accelerator mass spectrometry (AMS) system and an automated graphitization line were installed at Yamagata University (YU) in 2009. Approximately 2000 samples are measured per year using the YU-AMS system. The long-term stability of the system was assessed by measuring the standard sample IAEA-C7 graphitized by the automated graphitization line. In March 2014, a second automated graphitization line and an additional ion source for the YU-AMS system were installed to meet the requirement of 14C measurement for pharmacological and medical applications. A phosphoric acid treatment system was also developed for the radiocarbon dating of calcium carbonate (CaCO3) in shell and coral samples. Performance tests on the new YU-AMS system were carried out by measuring the C-series standard samples (C1-C9) and oxalic acid II (HOxII) obtained from IAEA and NIST, respectively. The results of the 14C concentration pMC are in good agreement with the consensus values. Performance tests for medical applications were also carried out by measuring the 14C concentration of 14C-glucose in human plasma.

Original languageEnglish
Pages (from-to)94-99
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Publication statusPublished - 2019 Jan 15


  • AMS
  • Microdosing
  • Radiocarbon dating


Dive into the research topics of 'Status of the AMS system at Yamagata University'. Together they form a unique fingerprint.

Cite this