EGU2020-9577, updated on 12 Jun 2020
https://doi.org/10.5194/egusphere-egu2020-9577
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

EnvironMICADAS C-14 AMS Gas ion source performance and its applications at HEKAL Laboratory, Debrecen, Hungary

Mihály Molnár1, Róbert Janovics1, István Major1, Katalin Hubay1, Botond Buró1, Tamás Varga1, Titanilla Kertész1, Virág Gergely1,2, Mihaly Veres3, and A.J. Timothy Jull1,4
Mihály Molnár et al.
  • 1ATOMKI, Debrecen, Hungary (molnar.mihaly@atomki.mta.hu)
  • 2University of Debrecen, Debrecen, H-4001
  • 3Isotoptech Zrt., Debrecen, Hungary, H-4026
  • 4University of Arizona AMS Laboratory, University of Arizona, Tucson, AZ, USA-85721

A coupled accelerator mass spectrometer - gas interface system successfully has been 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 34000-47000 yr BP, which allows for the routine measurement of both of small environmental and archeological samples.

The research was supported by the European Union and the State of Hungary, co-financed by the European Regional Development Fund in the project of GINOP-2.3.2-15-2016- 00009 “ICER”. This work was carried out in the frame of the János Bolyai Research Scholarship (Mihály Molnár) of the Hungarian Academy of Sciences

How to cite: Molnár, M., Janovics, R., Major, I., Hubay, K., Buró, B., Varga, T., Kertész, T., Gergely, V., Veres, M., and Jull, A. J. T.: EnvironMICADAS C-14 AMS Gas ion source performance and its applications at HEKAL Laboratory, Debrecen, Hungary, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-9577, https://doi.org/10.5194/egusphere-egu2020-9577, 2020

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