Quality assurance in accelerator mass spectrometry: Results from an international round-robin exercise for 10Be

Autor(en)

Silke Merchel, W. Bremser, S. Akhmadaliev, Maurice Arnold, Georges Aumaitre, Didier L. Bourles, Régis Braucher, Marc William Caffee, Marcus Christl, L. Keith Fifield, Robert C. Finkel, Stewart P. H. T. Freeman, A. Ruiz-Gómez, Peter W. Kubik, Martin Martschini, Dylan H. Rood, Stephen G. Tims, Anton Wallner, Klaus M. Wilcken, S. Xu

Abstrakt

The first international round-robin exercise for the measurement of the long-lived radionuclide Be-10 has been conducted. Ten participating accelerator mass spectrometry CAMS) facilities have each measured three samples at the 10(-12) to 10(-14) Be-10/Be-9 level. All results have been made traceable to the NISI SRM 4325 standard to avoid additional discrepancies that arise when different facilities use different calibration materials. Hence, the data concentrates on pure measurement distinctions. Multivariate statistical investigations have been performed to reveal a bias between facilities, i.e. two distinguished groups could be identified. Maximum discrepancies between two single facilities are in the range of 6-31% depending on the absolute Be-10/Be-9 value. These findings should be considered when comparing Be-10 data produced at one AMS facility with that produced at another facility, which is e.g. often the case for in situ Be-10 dating studies. Round-robin exercises are a very helpful tool as part of an overall quality assurance scheme to improve the accuracy, and not only the precision, of AMS data.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

Bundesanstalt für Materialforschung und -prüfung (BAM), Helmholtz-Zentrum Dresden-Rossendorf, CEREGE - Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement, Purdue University, Eidgenössische Technische Hochschule Zürich, Australian National University, University of Glasgow, Universidad de Sevilla, Lawrence Livermore National Laboratory

Journal

Nuclear Instruments & Methods in Physics Research. Section B. Beam Interactions with Materials and Atoms

Band

289

Seiten

68-73

Anzahl der Seiten

6

ISSN

0168-583X

DOI

https://doi.org/10.1016/j.nimb.2012.07.038

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/3149aa87-f8b2-4804-80dc-660742715c74