Direct AMS 14 C Analysis of Carbonate

Bibliographic Data

ID9245632
AuthorsQuan Hua (0000-0003-0179-8539), Vladimir A Levchenko (0000-0002-3847-264X), Matthew A Kosnik (0000-0001-5380-7041)
Year2019
Volume61
Issue5
Pages1431-1440
Publication date2019-10-01
Open AccessYes
TypeARTICLE
VenueRadiocarbon (JOURNAL)
Journal identifiersISSN: 0033-8222 • E-ISSN: 1945-5755
PublisherCambridge University Press (CUP) (PUBLISHER)
DOI10.1017/rdc.2019.24
OpenAlexW2936764203
LanguageEN
Citations received3
References cited27

We have investigated the possibility of direct accelerator mass spectrometry radiocarbon (AMS 14 C) measurement of carbonate samples at ANSTO using the STAR 2 MV tandem accelerator. Each carbonate sample was powdered, mixed with metal powder and pressed into an aluminum cathode for direct carbonate measurement by AMS 14 C. Of the three high-purity metal powders (Fe, Nb, and Ag) used in our investigation, Nb was found to be the best metal, which delivered higher carbon beam currents and lower background. Beam currents for targets containing the optimal carbonate mass of 1.5–2.0 mg were ∼8% of those obtained from graphite targets of standard size (>0.5 mg C). Typical measured blank for Carrara marble (IAEA-C1) of ∼40 ka was obtained. Background-corrected 14 C values of carbonate targets agreed well with their associated values obtained from high-precision analysis of graphite targets within 2σ uncertainties. Typical precision of this rapid AMS analysis was ∼1% for samples

Accelerator mass spectrometry · Carbon fibers · Carbonate · Graphite · Metal · Metallurgy · Mineralogy · Radiocarbon dating · Radiochemistry · Archaeology and ancient environmental studies · Chemistry · Geology and Paleoclimatology Research · Materials Science · Pacific and Southeast Asian Studies · Environmental Chemistry · Geology