Preparation of Graphite Targets in the Gliwice Radiocarbon Laboratory for AMS 14 C Dating

Dados Bibliográficos

ID9244192
AutoresJustyna Czernik, Tomasz Goslar (0000-0002-1346-3122)
Ano2001
Volume43
Fascículo2A
Páginas283-291
Data de publicação2001-01-01
Peer ReviewedSim
Open AccessSim
TipoARTICLE
PeriódicoRadiocarbon (JOURNAL)
Identificadores do periódicoISSN: 0033-8222 • E-ISSN: 1945-5755
EditoraCambridge University Press (CUP) (PUBLISHER)
DOI10.1017/s0033822200038121
OpenAlexW2501232329
IdiomaEN
Citações recebidas34
Referências citadas11

A line for preparation of graphite targets for accelerator mass spectrometry (AMS) radiocarbon dating has been built in the Gliwice 14 C Laboratory. The AMS 14 C measurements of our targets are performed in the Leibniz-Labor für Altersbestimmung, Kiel, Germany. The quality of our line has been tested in two series of AMS 14 C measurements of background and Ox-II standard samples and by measurements of the amount of CO 2 released during combustion of sample-free quartz tubes. Most background contamination in the first series was introduced during combustion, which has been greatly reduced by baking quartz tubes vacuum-sealed with CuO and Ag. The residual contamination (ca. 1.5 μg C) seems to come mostly from the quartz tubes themselves. At present, most of the contamination of the background is introduced during graphitization. The reproducibility of background preparations is satisfactory, especially for samples larger than 1.5 mg, when it is better than ± 0.09 pMC. Despite still significant contamination with low- 14 C carbon during the graphitization process (corresponding to 1.2 ± 0.2% of 14 C-free carbon), the good reproducibility of the results allows us to use our line in routine 14 C dating

Accelerator mass spectrometry · Carbon fibers · Chromatography · Composite material · Contamination · Graphite · Mass spectrometry · Metallurgy · Mineralogy · Quartz · Radiocarbon dating · Radiochemistry · Reproducibility · Archaeology and ancient environmental studies · Chemistry · Geology and Paleoclimatology Research · Materials Science · Pleistocene-Era Hominins and Archaeology · Environmental Chemistry · Geology