Hamburg 2009 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 55: Poster III
Q 55.33: Poster
Thursday, March 5, 2009, 16:30–19:00, VMP 8 Foyer
Implementation of Atom Trap Trace Analysis for 39Ar — •Joachim Welte1, Florian Ritterbusch1, Isabelle Steinke1, Anna Wonneberger2, Markus Oberthaler1, and Werner Aeschbach-Hertig2 — 1Kirchhoff Inst. f. Physics, University of Heidelberg, Heidelberg/ Germany — 2Inst. of Environmental Physics, University of Heidelberg, Heidelberg/ Germany
Dating water samples with 39Ar (T1/2 = 269a) is currently restricted by the limits of "traditional" Low Level Counting, namely the large samples necessary and the long measurement time. We try to overcome these limitations by Atom Trap Trace Analysis for this isotope and thus bridging the "dating gap" of 100 - 1000 years of water sample age. An ATTA table-top apparatus would find applications in many different fields due to its small size and "low" cost.
We report on several first steps that have been undertaken, e.g. from the environmental physics side of the project water degassing and gas separation and from the atom-optical side measurement of hyperfine structure of 39Ar, single atom detection and design of an atomic beam including source and collimation.