Two small Accelerator Mass Spectrometers (SSAMS and PIMS) to analyze C-14 at AORI, UTokyo

Abstract

A single-stage accelerator mass spectrometer (National Electrostatic Corporation, YS-AMS) at the Atmosphere and Ocean Research Institute (AORI), University of Tokyo, was installed in 2013 (Yokoyama et al., 2019). Since then, applications for earth and environmental sciences have expanded. Small scale radiocarbon analysis enable us to develop a method not only compound specific measurements but also pollen based radiocarbon measurements using flow cytometry flow cytometry (Ota et al., 2024). In March 2025, the first commercial positive ion mass spectrometer (National Electrostatic Corporation, PIMS) outside of Europe was installed and reliable datasets using the IAEA standard were produced and we will present recent developments in our YS-AMS related studies, in particular small-scale radiocarbon dating, as well as initial performance of the PIMS installed at AORI.In this presentation we will introduce recent developments in our YS-AMS related studies, in particular small-scale radiocarbon dating, as well as initial performance of the PIMS installed at AORI.