Mechernich, Silke ORCID: 0000-0003-3684-040X, Dunai, Tibor J., Binnie, Steven A., Goral, Tomasz, Heinze, Stefan, Dewald, Alfred, Schimmelpfennig, Irene ORCID: 0000-0001-8145-9160, Keddadouche, Karim, Aumaitre, Georges, Bourles, Didier, Marrero, Shasta ORCID: 0000-0003-2917-0292, Wilcken, Klaus ORCID: 0000-0002-6870-2047, Simon, Krista, Fink, David, Phillips, Fred M., Caffee, Marc W., Gregory, Laura C., Phillips, Richard, Freeman, Stewart P. H. T., Shanks, Richard, Sarikaya, M. Akif, Pavetich, Stefan ORCID: 0000-0001-8014-0545, Rugel, Georg, Merchel, Silke, Akcar, Naki, Yesilyurt, Serdar, Ivy-Ochs, Susan and Vockenhuber, Christof (2019). Carbonate and silicate intercomparison materials for cosmogenic Cl-36 measurements. Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms, 455. S. 250 - 260. AMSTERDAM: ELSEVIER. ISSN 1872-9584

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Abstract

Two natural mineral separates, labeled CoCal-N and CoFsp-N, have been prepared to serve as intercomparison material (ICM) for in situ-produced cosmogenic Cl-36 and natural chlorine (Cl-nat) analysis. The sample CoCal-N is derived from calcite crystals in a Namibian lag deposit, while the sample CoFsp-N is derived from a single crystal of alkali-feldspar from a Namibian pegmatite. The sample preparation took place at the University of Cologne and a rotating splitter was used to obtain homogeneous splits of both ICMs. Forty-five measurements of CoCal-N (between 1 and 16 per facility) and forty-four measurements of CoFsp-N (between 2 and 20 per facility) have been undertaken by ten target preparation laboratories measured by seven different AMS facilities. The internal laboratory scatter of the Cl-36 concentrations indicates no overdispersion for half of the laboratories and 3.9 to 7.3% (1 sigma) overdispersion for the others. We show that the CoCal-N and CoFsp-N splits are homogeneous regarding their Cl-36 and Cl-nat concentrations. The grand average (average calculated from the average of each laboratory) yields initial consensus Cl-36 concentrations of (3.74 +/- 0.10) x 10(6) at Cl-36/g (CoCal-N) and (2.93 +/- 0.07) x 10(6) at Cl-36/g (CoFsp-N) at 95% confidence intervals. The coefficient of variation is 5.1% and 4.2% for CoCal-N and CoFsp-N, respectively. The Cl-nat concentration corresponds to the lower and intermediate range of typical rock samples with (0.73 +/- 0.18) mu/g in CoCal-N and (73.9 +/- 6.8) mu/g in CoFsp-N. We discuss the most relevant points of the sample preparation and measurement and the chlorine concentration calculation to further approach inter-laboratory comparability. We propose to use continuous measurements of the ICMs to provide a valuable quality control for future determination of Cl-36 and Cl-nat concentrations.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Mechernich, SilkeUNSPECIFIEDorcid.org/0000-0003-3684-040XUNSPECIFIED
Dunai, Tibor J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Binnie, Steven A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goral, TomaszUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Heinze, StefanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dewald, AlfredUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schimmelpfennig, IreneUNSPECIFIEDorcid.org/0000-0001-8145-9160UNSPECIFIED
Keddadouche, KarimUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aumaitre, GeorgesUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bourles, DidierUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marrero, ShastaUNSPECIFIEDorcid.org/0000-0003-2917-0292UNSPECIFIED
Wilcken, KlausUNSPECIFIEDorcid.org/0000-0002-6870-2047UNSPECIFIED
Simon, KristaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fink, DavidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Phillips, Fred M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Caffee, Marc W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gregory, Laura C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Phillips, RichardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Freeman, Stewart P. H. T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shanks, RichardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sarikaya, M. AkifUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pavetich, StefanUNSPECIFIEDorcid.org/0000-0001-8014-0545UNSPECIFIED
Rugel, GeorgUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Merchel, SilkeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Akcar, NakiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yesilyurt, SerdarUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ivy-Ochs, SusanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vockenhuber, ChristofUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-141359
DOI: 10.1016/j.nimb.2019.01.024
Journal or Publication Title: Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
Volume: 455
Page Range: S. 250 - 260
Date: 2019
Publisher: ELSEVIER
Place of Publication: AMSTERDAM
ISSN: 1872-9584
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Department of Physics > Institute for Nuclear Physics
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
ACCELERATOR MASS-SPECTROMETRY; PRODUCTION-RATE CALIBRATION; ROCK AVALANCHES; PERFORMANCE; RATESMultiple languages
Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, NuclearMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/14135

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