[22a-C205-1~10] CS.1 Code-sharing Session of 2.3 & 7.5

[22a-C205-5] Development of Ion Funnel Reaction Cell for Suppression of Isobaric Interference

〇Satoshi Jinno¹, Natsuko Fujita¹, Hajime Tanuma² (1.JAEA, 2.TMU)

Keywords:AMS, negative ion, ion funnel

In accelerator mass spectrometry (AMS), the greatest challenge for ultra-high precision measurements is to detect the target nuclide separating from its isobars with the same charge. When chlorine-36(³⁶Cl) in groundwater, which is useful for dating in geological surveys, is the target nuclide, sulfur-36(³⁶S) is the interfering nuclide due to isobaric interference in AMS measurements. Generally, an acceleration voltage of 6 MV or higher is required to separate ³⁶Cl and ³⁶S, but the AMS system at the JAEA Tono Geoscience Center is limited to 5 MV acceleration. Therefore, we propose to develop a reaction cell with ion funnels that can selectively suppress ³⁶S and to incorporate it into the low energy side of the AMS system.