%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Binnie, S. A.
%A Dewald, A.
%A Heinze, S.
%A Voronina, E.
%A Hein, A.
%A Wittmann, H.
%A von Blanckenburg, F.
%A Hetzel, R.
%A Christl, M.
%A Schaller, M.
%A Leanni, Laetitia
%A Hippe, K.
%A Vockenhuber, C.
%A Ivy-Ochs, S.
%A Maden, C.
%A Fulop, R. H.
%A Fink, D.
%A Wilcken, K. M.
%A Fujioka, T.
%A Fabel, D.
%A Freeman, Spht
%A Xu, S.
%A Fifield, L. K.
%A Akcar, N.
%A Spiegel, C.
%A Dunai, T. J.
%A Aumaitre, G.
%A Bourles, D. L.
%A Keddadouche, K.
%A Aster Team,
%T Preliminary results of CoQtz-N : a quartz reference material for terrestrial in situ cosmogenic Be-10 and Al-26 measurements
%D 2019
%L PAR00019761
%G ENG
%J Nuclear Instruments and Methods in Physics Research Section B : Beam Interactions with Materials and Atoms
%@ 0168-583X
%K Al-26 ; Be-10 ; CoQtz-N ; Cosmogenic nuclides ; Reference material
%M ISI:000480669600032
%P 203-212
%R 10.1016/j.nimb.2019.04.073
%U https://www.documentation.ird.fr/hor/PAR00019761
%> https://www.documentation.ird.fr/intranet/publi/2019/08/010076591.pdf
%V 456
%W Horizon (IRD)
%X There is growing interest in geochronological applications of terrestrial in situ-produced cosmogenic nuclides, with the most commonly measured being Be-10 and Al-26 in quartz. To extract and then separate these radio-nuclides from quartz and prepare them in the oxide form suitable for accelerator mass spectrometry (AMS) requires extensive and careful laboratory processing. Here we discuss the suitability of a crushed, sieved and etched, sub-aerially exposed vein quartz specimen (CoQtz-N) to act as a reference material for chemical laboratory preparation and AMS measurements. Splits of CoQtz-N were distributed to eleven target preparation laboratories. The CoQtz-N Be-10 targets were then measured at seven different AMS facilities and five of the preparation laboratories had their Al-26 targets measured at four different AMS facilities. We show that CoQtz-N splits are sufficiently homogeneous with regard to nuclide concentrations, that it has been cleaned of any atmospheric derived (i.e. meteoric) Be-10 and that it has low concentrations of the major elements that can interfere with Be and Al extraction chemistry and AMS measurements. We derive preliminary concentrations for Be-10 and Al-26 in CoQtz-N as 2.53 +/- 0.09 x 10(6) at/g and 15.6 +/- 1.6 x 10(6) at/g, respectively, at the 95% confidence limit.
%$ 020 ; 064