International Workshop on ''Atomic Physics''

November 23 – 27, 2015

Poster Presentation


Imaging of the umbrella motion of ammonia using intense, ultrashort, long-wavelength laser pulses

Johann Förster
Humboldt-Universität zu Berlin
We explore the possibility to image the umbrella motion of ammonia to, e.g., create a real-time movie of a tunneling in a double well potential. The ionization behavior of the ammonia molecule as a function of the inversion coordinate is investigated. Different theoretical approaches for obtaining the ionization yield are compared, all of them showing a strong dependence of the ionization yield on the inversion coordinate, especially at long wavelengths ( ≥800 nm). We show how this effect can be exploited to create and probe nuclear wave packets in neutral ammonia. Furthermore, we propose dedicated experiments to image this motion by measuring the ionization yield or high-harmonic spectra.