EGU21-16090, updated on 04 Mar 2021
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Current stability to improve AMS precision for cosmogenic 10Be applications

Ana Carracedo Plumed, Derek Fabel, and Richard Shanks
Ana Carracedo Plumed et al.
  • University of Glasgow, SUERC, East Kilbride, United Kingdom of Great Britain – England, Scotland, Wales (

With the present AMS 10Be uncertainties (~2% best case scenario) and the increasing need for more precise cosmogenic 10Be data it has become imperative to improve AMS measurements. Precision depends on counting statistics which in turn depend on ion beam current stability and sample longevity. The ion beam currents are dependent on the metal matrix in which BeO is dispersed; the matrix:BeO ratio; homogeneity of the mixture and the packing of the AMS cathode. We aim to understand the effect of cathode homogeneity in generating stable beam currents. We have performed a series of experiments using different metal matrices (Nb, Ag, Fe) in different forms (solid and in solution). The metals have been added to different stages of the sample precipitation process and both BeO and Be(OH)2 have been pressed into AMS cathodes and analysed at SUERC. We will discuss results of these experiments and introduce an innovative use of polyoxometalates (molibdanate and niobate) to create a homogeneous compound that has the potential to generate stable ion beam currents from sputter ion sources.

How to cite: Carracedo Plumed, A., Fabel, D., and Shanks, R.: Current stability to improve AMS precision for cosmogenic 10Be applications, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-16090,, 2021.


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