Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 22: Posters: Quantum Optics and Photonics II
Q 22.7: Poster
Tuesday, March 10, 2020, 16:30–18:30, Empore Lichthof
Atom Trap Trace Analysis: An ultra-sensitive spectroscopy technique for dating of environmental tracers — •Julian Robertz1, Lisa Ringena1, Maximilian Schmidt1,2, Niccolo Rigi-Luperti1, Florian Sandel1, Jeremias Gutekunst1, Arne Kersting2, Yannis Arck2, David Wachs2, Annabelle Kaiser2, Werner Aeschbach2,3, and Markus Oberthaler1 — 1Kirchhoff Institute for Physics, Heidelberg, Germany — 2Institute for Environmental Physics, Heidelberg, Germany — 3Heidelberg Center for the Environment, Heidelberg, Germany
Environmental tracers serve as an important source of information in a wide range of natural sciences. Due to the low relative abundance of some of these tracers an ultra-sensitive detection technique is necessary. In the case of the environmental tracer 39Ar the Atom Trap Trace Analysis (ATTA) allows us to measure relative abundances in the range of 10−16. The isotopic shift in the resonance frequency together with multiple resonant scattering processes grants perfect selectivity. Single atoms are captured and identified in a magneto-optical trap (MOT), while the huge background of abundant isotopes remains unaffected.
This ultra-sensitive spectroscopy technique was successfully used to study groundwater, lake, ocean and ice samples. In order to stretch the available dating range to younger ages, first steps regarding ATTA with 85Kr have been taken. Preliminary investigations for the new laser system will be presented.