Development of crystal surface stripper method for realization of downsizing AMS

Jinno, Satoshi   ; Matsubara, Akihiro*; Fujita, Natsuko   ; Kimura, Kenji

Accelerator Mass Spectrometry (AMS) is widely used in archaeology and geosciences, and since the 2000s, downsized AMS with an acceleration voltage of 200500 kV has been put to practical use mainly for C dating. However, the beam divergence due to collisions with gases increases at accelerating energies below 100 keV, resulting in a decrease in transmittance. Therefore, we are investigating charge conversion and dissociation of interfering molecules on KCl, SnTe, and Au crystal surfaces using the crystal surface stripper method we have developed. In this article, we report on the position of our research and the current progress.