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GAS ION SOURCE PERFORMANCE OF THE ENVIRONMICADAS AT HEKAL LABORATORY, DEBRECEN, HUNGARY

Published online by Cambridge University Press:  09 March 2021

Mihály Molnár*
Affiliation:
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary
Marianna Mészáros
Affiliation:
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary
Róbert Janovics
Affiliation:
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary
István Major
Affiliation:
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary
Katalin Hubay
Affiliation:
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary
Botond Buró
Affiliation:
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary
Tamás Varga
Affiliation:
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary University of Debrecen, Debrecen, H-4001, Hungary
Titanilla Kertész
Affiliation:
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary University of Debrecen, Debrecen, H-4001, Hungary
Virág Gergely
Affiliation:
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary University of Debrecen, Debrecen, H-4001, Hungary
Ádám Vas
Affiliation:
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary University of Debrecen, Debrecen, H-4001, Hungary
Gergely Orsovszki
Affiliation:
Isotoptech Zrt., Debrecen, H-4026, Hungary
Anita Molnár
Affiliation:
Isotoptech Zrt., Debrecen, H-4026, Hungary University of Debrecen, Debrecen, H-4001, Hungary
Mihály Veres
Affiliation:
Isotoptech Zrt., Debrecen, H-4026, Hungary
Martin Seiler
Affiliation:
National Laboratory for Age Determination, NTNU, Trondheim, NO-7491, Norway
Lukas Wacker
Affiliation:
Laboratory for Ion Beam Physics, ETH Zürich, Zürich, CH-8093, Switzerland
A J Timothy Jull
Affiliation:
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary University of Arizona AMS Laboratory, University of Arizona, Tucson, AZ85721USA University of Arizona, Department of Geosciences, Tucson, AZ85721USA
*
*Corresponding author. Email: molnar.mihaly@atomki.mta.hu.

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 µg 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 µA with a 5% CO2 in He mixing ratio. The relative errors average ±6% for samples greater than or equal to 10 µgC 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.

Type
Research Article
Copyright
© The Author(s), 2021. Published by Cambridge University Press for the Arizona Board of Regents on behalf of the University of Arizona

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