The black magic behind the dating of core PS2644 back to 62 ka ¹⁴C BP

M.-J. Nadeau, P.M.Grootes, A. Oriwall, Anke Rieck, and, M. Hüls

Leibniz Laboratory for Radiometric Dating and Isotope Research, Christian Albrecht University, Kiel, Germany. The dating of samples back to 62 ka ¹⁴C BP requires special precautions from sample selection and preparation to data reduction. In this presentation, we will cover the methods and checks used on our 3 MV HVEE AMS system, equipped with separator/recombinator magnet assembly, to date core PS2644 up to 62 ka ¹⁴C BP, namely:

 

• Accelerator system background and stability
• Sample preparation process blank
• Background correction (choice of background material and uncertainty of the correction)
• Measuring scheme, data reduction and evaluation of the overall results uncertainty
• Reproducibility of the results