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Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 24: Poster: Quantum Optics and Photonics I

Q 24.22: Poster

Tuesday, March 12, 2019, 16:30–18:30, S Fobau Physik

The Heidelberg ArTTA: Application of Quantum Technology for radiometric dating of environmental samples – Latest News — •Julian Robertz1, Lisa Ringena1, Maximilian Schmidt1,2, Zhongyi Feng1, Arne Kersting2, Werner Aeschbach2,3, and Markus K. Oberthaler11Kirchhoff Institute for Physics, Heidelberg, Germany — 2Institute for Environmental Physics, Heidelberg, Germany — 3Heidelberg Center for the Environment, Heidelberg, Germany

The Heidelberg Argon Trap Trace Analysis (ArTTA) apparatus applies quantum optical methods to establish an ultra-sensitive detection method for the radioisotope 39Ar, which, with a half-life of 269 years, serves as a unique tracer for dating of environmental samples. The ratio of 39Ar to Ar in fresh air is 10−16. To distinguish the isotope of interest from the huge background of abundant isotopes the isotopic shift in optical resonance frequency is utilized. The high selectivity is achieved by a multitude of scattering processes, which are realized in a magneto-optical trap (MOT), where single atoms are captured and detected.

A second apparatus is built up to increase the measurement throughput. Several optimizations have been made compared to the existing measurent setup. We will present latest developments and new design ideas.

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