GAS ION SOURCE PERFORMANCE of the ENVIRONMICADAS at HEKAL LABORATORY, DEBRECEN, HUNGARY

Mihály Molnár; Marianna Mészáros; Róbert Janovics; István Major; Katalin Hubay; Botond Buró; Tamás Varga; Titanilla Kertész; Virág Gergely; Ádám Vas; Gergely Orsovszki; Anita Molnár; Mihály Veres; Martin Seiler; Lukas Wacker; A. J. Timothy Jull

doi:10.1017/RDC.2020.109

GAS ION SOURCE PERFORMANCE of the ENVIRONMICADAS at HEKAL LABORATORY, DEBRECEN, HUNGARY

Mihály Molnár, Marianna Mészáros, Róbert Janovics, István Major, Katalin Hubay, Botond Buró, Tamás Varga, Titanilla Kertész, Virág Gergely, Ádám Vas, Gergely Orsovszki, Anita Molnár, Mihály Veres, Martin Seiler, Lukas Wacker, A. J. Timothy Jull

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

A coupled accelerator mass spectrometer-gas interface system has been successfully operating at the Hertelendi Laboratory of Environmental Studies, Debrecen, Hungary, since 2013. Over the last 6 years more than 500 gas targets were measured below 100 g carbon content for carbon isotopic composition. The system was tested with blanks, OxII, IAEA-C1, IAEA-C2, and IAEA-C7 standards. The performance of our instrumentation shows good agreement with other published gas-interface system data and also shows a quite good agreement with the nominal value of international standard samples. There is a measurable but quite small memory effect after modern samples, but this does not significantly affect the final results. Typical ion currents at the low energy side were between 10-15 A with a 5% CO2 in He mixing ratio. The relative errors average ±6% for samples greater than or equal to 10 gC sample with mean count rates of 300 counts per microgram C for OxII. The blank is comparable with other systems, which is 0.0050 ± 0.0018 F14C or 34,000-47,000 yr BP, which allows for the routine measurement of both of small environmental and archeological samples.

Original language	English (US)
Pages (from-to)	499-511
Number of pages	13
Journal	Radiocarbon
Volume	63
Issue number	2
DOIs	https://doi.org/10.1017/RDC.2020.109
State	Published - Apr 2021

Keywords

AMS
MICADAS
gas interface system
gas ion source
radiocarbon

ASJC Scopus subject areas

Archaeology
General Earth and Planetary Sciences

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10.1017/RDC.2020.109

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Molnár, M., Mészáros, M., Janovics, R., Major, I., Hubay, K., Buró, B., Varga, T., Kertész, T., Gergely, V., Vas, Á., Orsovszki, G., Molnár, A., Veres, M., Seiler, M., Wacker, L., & Timothy Jull, A. J. (2021). GAS ION SOURCE PERFORMANCE of the ENVIRONMICADAS at HEKAL LABORATORY, DEBRECEN, HUNGARY. Radiocarbon, 63(2), 499-511. https://doi.org/10.1017/RDC.2020.109

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abstract = "A coupled accelerator mass spectrometer-gas interface system has been successfully operating at the Hertelendi Laboratory of Environmental Studies, Debrecen, Hungary, since 2013. Over the last 6 years more than 500 gas targets were measured below 100 g carbon content for carbon isotopic composition. The system was tested with blanks, OxII, IAEA-C1, IAEA-C2, and IAEA-C7 standards. The performance of our instrumentation shows good agreement with other published gas-interface system data and also shows a quite good agreement with the nominal value of international standard samples. There is a measurable but quite small memory effect after modern samples, but this does not significantly affect the final results. Typical ion currents at the low energy side were between 10-15 A with a 5% CO2 in He mixing ratio. The relative errors average ±6% for samples greater than or equal to 10 gC sample with mean count rates of 300 counts per microgram C for OxII. The blank is comparable with other systems, which is 0.0050 ± 0.0018 F14C or 34,000-47,000 yr BP, which allows for the routine measurement of both of small environmental and archeological samples.",

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AU - Molnár, Mihály

AU - Mészáros, Marianna

AU - Janovics, Róbert

AU - Major, István

AU - Hubay, Katalin

AU - Buró, Botond

AU - Varga, Tamás

AU - Kertész, Titanilla

AU - Gergely, Virág

AU - Vas, Ádám

AU - Orsovszki, Gergely

AU - Molnár, Anita

AU - Veres, Mihály

AU - Seiler, Martin

AU - Wacker, Lukas

AU - Timothy Jull, A. J.

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N2 - A coupled accelerator mass spectrometer-gas interface system has been successfully operating at the Hertelendi Laboratory of Environmental Studies, Debrecen, Hungary, since 2013. Over the last 6 years more than 500 gas targets were measured below 100 g carbon content for carbon isotopic composition. The system was tested with blanks, OxII, IAEA-C1, IAEA-C2, and IAEA-C7 standards. The performance of our instrumentation shows good agreement with other published gas-interface system data and also shows a quite good agreement with the nominal value of international standard samples. There is a measurable but quite small memory effect after modern samples, but this does not significantly affect the final results. Typical ion currents at the low energy side were between 10-15 A with a 5% CO2 in He mixing ratio. The relative errors average ±6% for samples greater than or equal to 10 gC sample with mean count rates of 300 counts per microgram C for OxII. The blank is comparable with other systems, which is 0.0050 ± 0.0018 F14C or 34,000-47,000 yr BP, which allows for the routine measurement of both of small environmental and archeological samples.

AB - A coupled accelerator mass spectrometer-gas interface system has been successfully operating at the Hertelendi Laboratory of Environmental Studies, Debrecen, Hungary, since 2013. Over the last 6 years more than 500 gas targets were measured below 100 g carbon content for carbon isotopic composition. The system was tested with blanks, OxII, IAEA-C1, IAEA-C2, and IAEA-C7 standards. The performance of our instrumentation shows good agreement with other published gas-interface system data and also shows a quite good agreement with the nominal value of international standard samples. There is a measurable but quite small memory effect after modern samples, but this does not significantly affect the final results. Typical ion currents at the low energy side were between 10-15 A with a 5% CO2 in He mixing ratio. The relative errors average ±6% for samples greater than or equal to 10 gC sample with mean count rates of 300 counts per microgram C for OxII. The blank is comparable with other systems, which is 0.0050 ± 0.0018 F14C or 34,000-47,000 yr BP, which allows for the routine measurement of both of small environmental and archeological samples.

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KW - MICADAS

KW - gas interface system

KW - gas ion source

KW - radiocarbon

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GAS ION SOURCE PERFORMANCE of the ENVIRONMICADAS at HEKAL LABORATORY, DEBRECEN, HUNGARY

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Keywords

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