Hannover 2016 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 7: Accelerator Mass Spectrometry and Applications I
MS 7.6: Vortrag
Donnerstag, 3. März 2016, 12:30–12:45, f128
Speed Dating: A Rapid Way to Determine the Radiocarbon Age of Wood by EA-AMS — •Adam Sookdeo1, Lukas Wacker1, Simon Fahrni1, Cameron P. McIntyre1, Micheal Fredrich2,3, Frederick Reinig4, Bernd Kromer2, and Ulf Büntgen4 — 1Laboratory of Ion beam physics, ETH-Zürich, Zürich Switzerland — 2Institute of environmental physics, Heidelberg University, Heidelberg, Germany — 3Institute of Botany, Hohenheim University, Stuttgart, Germany — 4Swiss Federal Research Institute, WSL, Birmensdorf, Switzerland
Trees ranging from modern to 14000BP and older are discovered in construction sites, rivers and lake sediments, these trees contain information about past atmospheric 14C concentration that is used to create 14C calibration curve. When new trees are found the scientific value remains unclear until they are dated, this can be expensive and time consuming using conventional techniques. At the Laboratory of Ion beam Physics (LIP), we developed a new application called Speed Dating to quickly establish 14C dates for wood samples using an Elemental Analyzer (EA) coupled to an Accelerator Mass Spectrometer (AMS). For Speed Dating we do not chemical treat the wood samples but rather directly combust wood using an EA and the CO2(g) is measured by an AMS. This results in measurements times that are five times quicker than conventional 14C dating and are cheaper.