Isobar-free neon isotope measurements of flux-fused potential reference minerals on a Helix-MC-Plus  mass spectrometer

Farley, Kenneth A.; Treffkorn, Jonathan; Hamilton, D. C.

doi:10.1016/j.chemgeo.2020.119487

Cited by 11 publications

(12 citation statements)

References 28 publications

(45 reference statements)

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“…The calculated cosmogenic 21 Ne abundances from 22 aliquots of CREU-1 (Table 1) all agree within 2σ with their arithmetic mean (348 ±10 x 10 6 atoms/g; ±2σ); thus, we may calculate an error-weighted mean: 348 ± 2 x 10 atoms/g (±2σ), which is indistinguishable from the published value (348± 10 x 10 6 atoms/g; Vermeesch et al, 2015). We conclude that the reproducibility and accuracy of the current set up at the University of Cologne for determining cosmogenic 21 Ne in quartz is similar to or better than those reported for other laboratories worldwide (Vermeesch et al, 2015;Farley et al, 2020;Ma et al, 2015). Vermeesch et al, 2015).…”

Section: Performancecontrasting

confidence: 48%

“…Honda et al, 2015;Wielandt and Storey, 2019) and its ability to reliably measure 21 Ne at an off-centre peak position that is free of interference from 20 NeH + (Honda et al, 2015;Wielandt and Storey, 2019). The remaining interference of 12 C 16 O2 2+ at m/e=22 can be corrected via monitoring of the double/single-charged ratio of CO2 in-between samples (Honda et al, 2015) or the measurement of 13 C 16 O2 2+ at m/e= 22.5 during sample analysis (Wielandt and Storey, 2019 (Farley et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Technical Note: Noble gas extraction procedure and performance of the Cologne Helix MC Plus multi-collector noble gas mass spectrometer for cosmogenic neon isotope analysis

Ritter¹,

Vogt²,

Dunai³

2021

Preprint

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Abstract. We established a new laboratory for noble gas mass spectrometry that is dedicated for the development and application to cosmogenic nuclides at the University of Cologne (Germany). At the core of the laboratory are a state-of-the-art high mass resolution multicollector Helix MCPlus (Thermo-Fisher) noble gas mass spectrometer and a novel custom-designed automated extraction line. The Mass-spectrometer is equipped with five combined Faraday Multiplier collectors, with 1012 Ω and 1013 Ω pre-amplifiers for faraday collectors. We describe the extraction line and the automized operation procedure for cosmogenic neon and the current performance of the experimental setup. Performance tests were conducted using gas of atmospheric isotopic composition (our primary standard gas); as well as CREU-1 intercomparison material, containing a mixture of neon of atmospheric and cosmogenic composition. We use the results from repeated analysis of CREU-1 to assess the performance of the current experimental setup at Cologne. The precision in determining the abundance of cosmogenic 21Ne is equal or better than those reported for other laboratories. The absolute value we obtain for the concentration of cosmogenic 21Ne in CREU is indistinguishable from the published value.

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Section: Performancecontrasting

confidence: 48%

Section: Introductionmentioning

confidence: 99%

Technical Note: Noble gas extraction procedure and performance of the Cologne Helix MC Plus multi-collector noble gas mass spectrometer for cosmogenic neon isotope analysis

Ritter¹,

Vogt²,

Dunai³

2021

Preprint

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“…PC2: (L1: 22 Ne-CDD: 21 High precision Ne isotope analysis is complicated by isobaric interferences at all peaks. Although new instruments can either fully or partially resolve some of the common interferences [8,9], in many cases, a correction is required [6,7,10,14,15]. This requires the measurement of several other peaks, which has an implication on measurement time and data precision.…”

Section: Figurementioning

confidence: 99%

“…Cosmogenic Ne was proven to be an adept recorder of the timing and rates of surface processes on the Earth and Moon [1][2][3] and the time of meteorite release from parent bodies [4]. Precise determination of neon isotopes in rocks and minerals are conventionally made using static gas magnetic sector mass spectrometers [5][6][7][8]. The low production rate at the Earth's surface and the presence of isobaric interferences at all Ne isotopes means that precise determination of terrestrial cosmogenic Ne is routinely measured in only a handful of laboratories worldwide [5].…”

Section: Introductionmentioning

confidence: 99%

“…The low production rate at the Earth's surface and the presence of isobaric interferences at all Ne isotopes means that precise determination of terrestrial cosmogenic Ne is routinely measured in only a handful of laboratories worldwide [5]. Improvements in mass spectrometry in the last ten years, in particular the ability to resolve some of main isobaric interferences [8][9][10], will lead to better and faster cosmogenic Ne determinations.…”

Section: Introductionmentioning

confidence: 99%

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New System for Measuring Cosmogenic Ne in Terrestrial and Extra-Terrestrial Rocks

et al. 2021

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Cosmogenic Ne isotopes are used for constraining the timing and rate of cosmological and Earth surface processes. We combined an automated gas extraction (laser) and purification system with a Thermo Fisher ARGUS VI mass spectrometer for high through-put, high precision Ne isotope analysis. For extra-terrestrial material with high cosmogenic Ne concentrations, we used multi-collection on Faraday detectors. Multiple measurements (n = 26) of 1.67 × 10−8 cm3 air-derived 20Ne yielded an uncertainty of 0.32%, and 21Ne/20Ne = 0.17% and 22Ne/20Ne = 0.09%. We reproduced the isotope composition of cosmogenic Ne in the Bruderheim chondrite and Imilac pallasite in a sub-ten mg sample. For lower Ne amounts that are typical of terrestrial samples, an electron multiplier detector was used in peak jumping mode. Repeated analysis of 3.2 × 10−11 cm3 STP 20Ne from air reproduced 21Ne/20Ne and 22Ne/20Ne with 1.1% and 0.58%, respectively, and 20Ne intensity with 1.7% (n = 103) over a 4-month period. Multiple (n = 8) analysis of cosmogenic Ne in CREU-1 quartz yielded 3.25 ± 0.24 × 108 atoms/g (2 s), which overlaps with the global mean value. The repeatability is comparable to the best data reported in the international experiments performed so far on samples that are 2–5× smaller. The ability to make precise Ne isotope determinations in terrestrial and extra-terrestrial samples that are significantly smaller than previously analysed suggests that the new system holds great promise for studies with limited material.

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Noble gas mass spectrometry

Broadley,

Bekaert

2024

Reference Module in Earth Systems and Environmental Sciences

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Isobar-free neon isotope measurements of flux-fused potential reference minerals on a Helix-MC-Plus mass spectrometer

Cited by 11 publications

References 28 publications

Technical Note: Noble gas extraction procedure and performance of the Cologne Helix MC Plus multi-collector noble gas mass spectrometer for cosmogenic neon isotope analysis

Technical Note: Noble gas extraction procedure and performance of the Cologne Helix MC Plus multi-collector noble gas mass spectrometer for cosmogenic neon isotope analysis

New System for Measuring Cosmogenic Ne in Terrestrial and Extra-Terrestrial Rocks

Noble gas mass spectrometry

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