ATTA

The Heidelberg Argon Trap Trace Analysis (ArTTA) apparatus applies quantum optical methods to establish an ultra-sensitive detection method for the radioisotope $^{39}$Ar, which, with a half-life of 269 years, serves as a unique tracer for dating of environmental samples. The ratio of $^{39}$Ar to Ar in fresh air is 10$^{−15}$. 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.

ATTA, ArTTA & KrypTTA The difference between the three shortcuts is rather simple: ATTA is the general Atom Trap Trace Analysis technique, undependent of the isotope of interest. ArTTA and KrypTTA are used to specify the analysed isotope Argon ($^{39}$Ar), Krypton ($^{85}$Kr) respectively.

Learn more about our ArTTA machine.

Open positions

We’re looking for Master as well as Bachelor students. Just write a mail to Markus K. Oberthaler, Lisa Ringena, Julian Robertz, Yannis Arck or David Wachs, come around and have a chat. Your project could be

  • surpression of cross-sampling contamination measuring $^{85}$Kr
  • finalization of a laser system for Kr
  • modularization of a laser system for Ar
  • measuring environmental samples and interpretation of the result
Lisa Ringena
Lisa Ringena
PhD Student
Julian Robertz
Julian Robertz
PhD Student
David Wachs
David Wachs
PhD Student
Yannis Arck
Yannis Arck
PhD Student

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