Scavenger hunt: Searching for the optimal target material for low-level 210Pb accelerator mass spectrometry

M.B. Froehlich,Z. Slavkovská,D. Koll,S. Pavetich, F. Dastgiri,L.K. Fifield,M.A.C Hotchkis,S. Merchel,S.G. Tims,A. Wallner

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms（2022）

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Abstract

•For different lead compounds the 208PbO2− and 208PbF3− currents were 0.5–1.2 μA.•The performance of PbF2 mixed with AgF, AgF2 and SbF3 at different ratios was tested.•The negative ion production increased with a lower Cs temperature of 86 °C.•Negative ion formation efficiencies of ∼2.4 ‰ could be achieved.

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Key words

Accelerator mass spectrometry,210Pb,PbF2 matrix,AgF2,AgF,Negative ion production,Dark matter

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