Article
Ca-41 measurements on the 1 MV AMS facility at the Centro Nacional de Aceleradores (CNA, Spain)
Author/s | Vivo Vilches, Carlos
López Gutiérrez, José María ![]() ![]() ![]() ![]() ![]() ![]() ![]() García León, Manuel ![]() ![]() ![]() ![]() ![]() ![]() ![]() Vockenhuber, Christof Walczyk, Thomas |
Department | Universidad de Sevilla. Departamento de Física Aplicada I Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Publication Date | 2017-12-15 |
Deposit Date | 2023-07-17 |
Published in |
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Abstract | We present a detailed study of the performance parameters for 41Ca measurements at the 1 MV AMS system at the Centro Nacional de Aceleradores (CNA) in Seville.
Mixing CaF2 with Ag, we get stable (40CaF3)− currents between ... We present a detailed study of the performance parameters for 41Ca measurements at the 1 MV AMS system at the Centro Nacional de Aceleradores (CNA) in Seville. Mixing CaF2 with Ag, we get stable (40CaF3)− currents between 50 and 100 nA. Transmission of the 2+ state in the He stripper is 41%, while optical transmission in the HE sector is typically higher than 95%. At low energies we cannot separate 41Ca from the isobar 41K at the detector, but the interference is reduced by using (41CaF3)− ions. The remaining contribution is corrected by measurement of the other stable isotope of potassium, 39K, to estimate this interference (K-correction). After this correction, we reach a 41Ca/40Ca background level between 5 × 10−12 and 8 × 10−12, making possible measurements of 41Ca/40Ca ratios higher than 4 × 10−11. Intercomparisons with the 0.6 MV AMS system at ETH Zurich show a quite good correlation. |
Funding agencies | Ministerio de Economía y Competitividad (MINECO). España |
Project ID. | FIS2015-69673-P
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Citation | Vivo Vilches, C., López Gutiérrez, J.M., García León, M., Vockenhuber, C. y Walczyk, T. (2017). Ca-41 measurements on the 1 MV AMS facility at the Centro Nacional de Aceleradores (CNA, Spain). Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 413, 13-18. https://doi.org/10.1016/j.nimb.2017.10.003. |
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