10Be at iThemba LABS using a silicon nitride membrane stack as absorber for isobar suppression

Winkler, S.; Mbele, V.; Khosa, R.; Corbett, L. B.; Bierman, P.; Hidy, A.; Brown, T.; Makhubela, T. V.; Kramers, J.; Tooth, S.

doi:10.1016/j.nimb.2023.03.024

Title: ¹⁰Be at iThemba LABS using a silicon nitride membrane stack as absorber for isobar suppression

Journal Article · Sun Apr 23 00:00:00 EDT 2023 · Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms

DOI:https://doi.org/10.1016/j.nimb.2023.03.024· OSTI ID:1971307

^[1];

^[2];

^[3]; Corbett, L. B. ^[4]; Bierman, P. ^[4]; Hidy, A. ^[5]; Brown, T. ^[5];

^[6]; Kramers, J. ^[6]; Tooth, S. ^[7]

iThemba LABS, Johannesburg (South Africa); Helmholtz-Zentrum Dresden-Rossendorf (Germany)
iThemba LABS, Johannesburg (South Africa)
iThemba LABS, Johannesburg (South Africa); University of Johannesburg (South Africa)
University of Vermont, Burlington, VT (United States)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
University of Johannesburg (South Africa)
Aberystwyth University, Wales (United Kingdom)

¹⁰Be is an important isotope for accelerator mass spectrometry (AMS) because of the demand for cosmogenic radionuclide dating methods in the earth science and paleo-sciences community. At the iThemba Laboratory for Accelerator Based Science (iThemba LABS) we implemented full suppression of the interfering isobar ¹⁰B using a silicon nitride foil-stack, utilizing the 2+ charge state for high efficiency. We demonstrate the performance of this newly established AMS system using standards and test samples. Here we further present the results of an inter-comparison between iThemba LABS and the Center for Accelerator Mass Spectrometry/Lawrence Livermore National Laboratory, on AMS samples prepared from purified quartz at the University of Vermont. The results for ¹⁰Be from the laboratories are in close agreement, fully consistent with cross-calibration between them. AMS results for ²⁶Al are in similarly good agreement, demonstrating the performance and accuracy of iThemba LABS for the most commonly measured in situ produced cosmogenic nuclides.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); National Research Foundation of South Africa; National Science Foundation (NSF)

Grant/Contract Number:: AC52-07NA27344; 98920; AOGR 98837; EAR-1735676

OSTI ID:: 1971307

Alternate ID(s):: OSTI ID: 1971564

Report Number(s):: LLNL-JRNL-835784; 1053562; TRN: US2313561

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms, Vol. 540, Issue na; ISSN 0168-583X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Title: 10Be at iThemba LABS using a silicon nitride membrane stack as absorber for isobar suppression

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Title: ¹⁰Be at iThemba LABS using a silicon nitride membrane stack as absorber for isobar suppression