E/Q and ME/Q2 contributions to machine background in sequential injection radiocarbon AMS

Calcagnile, Lucio; Quarta, Gianluca

doi:10.1016/j.nimb.2009.10.042

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…IAEA C-6 (sucrose) and IAEA C-4 (subfossil wood) standards were used for normalization and for background correction, respectively. Unprocessed graphite from Alfa Aesar was used for measurement of the machine background, which is estimated to be 10 16 ( 14 C/ 12 C ratio) (Calcagnile and Quarta 2010). The 14 C concentrations measured were corrected for mass fractionation by making use of the  13 C term measured on-line with the AMS system, and the conventional 14 C ages were calculated according to Stuiver and Polach (1977).…”

Section: Methodsmentioning

confidence: 99%

Wiggle-Match Dating of Wooden Samples from Iron Age Sites in Northern Italy

et al. 2010

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ABSTRACT. Archaeological excavations carried out at the sites of Laion/Lajen (Bolzano/Bozen) and Stufles-Oberegger (Bressanone/Brixen) in northern Italy uncovered well-preserved wooden samples in cultural layers archaeologically dated to the Iron Age. From the 2 sites, different wooden samples were recovered that were well preserved enough to allow clear identification of the tree species and of the ring structure. Among the different wooden samples, 2 were selected for radiocarbon analyses: from Laion/Lajen, a beam with an unbroken sequence of 158 rings; from Stufles-Oberegger, a combusted trunk with a sequence of 217 rings. Both samples were identified as Larix decidua species. From each sequence, single rings were selected and submitted for accelerator mass spectrometry (AMS) 14 C dating analysis at CEDAD. Conventional 14 C ages were then calibrated to calendar ages using the IntCal04 atmospheric data set, while the statistical constraints resulting from the defined ring sequence were used to develop a wiggle-matching approach by making use of the Bayesian analysis functions available in OxCal. The obtained results are an important contribution in refining the chronology of the studied sites.

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Section: Methodsmentioning

confidence: 99%