[20p-PB4-1~94] 2 Ionizing Radiation (Poster)

[20p-PB4-85] Present status of YU-AMS system III

〇Mirei Takeyama¹, Toru Moriya¹, Hirohisa Sakurai², Hiroko Miyahara³, Motonari Ohyama⁴, Hisako Saitoh⁵, Yasushi Okada⁶, Fuyuki Tokanai^1,2 (1.Yamagata Univ. Center for AMS, 2.Yamagata Univ., 3.Musashino Art Univ., 4.Tohoku Univ., 5.Chiba Univ., 6.Kibunken)

Keywords:accelerator mass spectrometry

An accelerator mass spectrometry (AMS) system and an automated graphitization line were installed at Yamagata University (YU) in 2010. The AMS system is based on a 0.5 MV pelletron accelerator (1.5SDH-1) developed by National Electrostatics Corporation (NEC). This is the first AMS system to be installed at a university in northern Japan (Tohoku-Hokkaido region). A second automated graphitization line and an additional ion source for the YU-AMS system were installed in 2013. In 2015, a phosphoric acid treatment system was also developed for the radiocarbon dating of calcium carbonate (CaCO₃) in shell and coral samples. Approximately 2,000 samples are measured per year using the YU-AMS system. The most commonly measured samples were wood. The second and third most commonly measured samples were charcoal and soil, respectively, which were mainly extracted from historical remains. In this conference, the present status of the YU-AMS system is presented.