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Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1984 We have dated ice core samples by 14C AMS to show that this method extends other ice dating methods and enables direct comparison with 14C related climatic events found elsewhere. For the measurement we use the CO2 that was occluded together with the air at the time of ice formation. To extract the CO2 we crush the samples with a milling cutter.
Andree, M. +10 more
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Enrichment of 14C and radiocarbon dating
Nature, 1978THE very low natural abundance of 14C (10−12 times that of 12C) and its exponential decrease in time require exceptionally sensitive methods for its measurement in the dating of archaeological and environmental samples. Present methods count β emission from the nuclear disintegration and so require substantial samples (1–5 g), long count times (1–3 d),
C Bradley Moore, R E M Hedges
exaly +2 more sources
14C dating of sediment samples
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1997Abstract We report on the 14 C dating of sediment samples from Bavaria using the Erlangen AMS facility. The absolute time calibration of different sediment profiles together with pollen analyses should establish a better chronology of climate and vegetation during the Holocene in Bavaria.
W. Kretschmer +12 more
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14C dating of Gorleben groundwater
Applied Geochemistry, 2000Previous attempts to apply 14C for dating of groundwater in the Gorleben aquifer system has given results with conflicting 3H and stable isotope data and hydrological estimates. 14C model ages of 1–10 ka have been found for 3H containing recharge water, up to 31 ka for groundwater with Holocene stable isotope signatures and 6–10 ka for groundwater at ...
G. Buckau +5 more
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Quaternary International, 1990
Only indirect age determinations up to 50 ka BP can be carried out on loess using the 14C dating method. Organic materials such as charcoal, wood, and bones embedded in loess are suitable for dating. Soil horizons are less suitable due to the mobility of humic acids, which are used for dating. Snail shells constitute the best kind of organic carbonates
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Only indirect age determinations up to 50 ka BP can be carried out on loess using the 14C dating method. Organic materials such as charcoal, wood, and bones embedded in loess are suitable for dating. Soil horizons are less suitable due to the mobility of humic acids, which are used for dating. Snail shells constitute the best kind of organic carbonates
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The role of 14C dating in ironpan formation
The Holocene, 2000The results of novel experiments undertaken to attempt to date ironpans using AMS radiocarbon dating are reported. In the absence of clear stratigraphic control, for example where buried soils are present, it is difficult to put into sequence the events which have led to the formation of present-day soil profiles.
Bruce Lascelles +2 more
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2001
In the 1980s and 1990s a range of new dating methodologies has emerged that are based on radiation exposure effects in host materials. These methodologies include electron spin resonance (ESR) and various forms of luminescence dating (OSL, IRSL, and TL).
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In the 1980s and 1990s a range of new dating methodologies has emerged that are based on radiation exposure effects in host materials. These methodologies include electron spin resonance (ESR) and various forms of luminescence dating (OSL, IRSL, and TL).
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Problems encountered with the 14C dating of peat
Quaternary Science Reviews, 1995Abstract Pairs of neighbouring short columns of peat from two sites in Northern England were divided into contiguous 1 cm thick slices that were sub-sampled for pollen and plant macro fossil analysis. For each slice the remaining peat was then split into humic acid, humin and fulvic acid fractions and radiocarbon dated.
J.S. Shore, D.D. Bartley, D.D. Harkness
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Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1997
Abstract A method for refining lime mortar samples for 14 C dating has been developed. It includes mechanical and chemical separation of mortar carbonate with optical control of the purity of the samples. The method has been applied to a large series of AMS datings on lime mortar from three medieval churches on the Aland Islands, Finland.
Jan Heinemeier +5 more
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Abstract A method for refining lime mortar samples for 14 C dating has been developed. It includes mechanical and chemical separation of mortar carbonate with optical control of the purity of the samples. The method has been applied to a large series of AMS datings on lime mortar from three medieval churches on the Aland Islands, Finland.
Jan Heinemeier +5 more
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RADIOCARBON DATING | Variations in Atmospheric 14C
2007The radiocarbon dating method is a crucial tool for a variety of applications in the Quaternary of the past 50,000 years. The 14C calibration curve, obtained by dating samples by 14C and another independent method, has an irregular shape caused by variations in the natural atmospheric 14C content.
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