Hannover 2016 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 14: Posters 3: Novelties in Molecular Physics: Theory of Molecular Dynamics, Collisions and Energy Transfer, and Experimental Techniques
MO 14.10: Poster
Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof
High-resolution spectroscopy on the hyperfine structure of small aluminum bearing molecules — •Björn Waßmuth1, Alexander Breier1, Thomas F. Giesen1, and Jürgen Gauss2 — 1Institut für Physik, Universität Kassel, 34132 Kassel, Germany — 2Institut für Physikalische Chemie, Universität Mainz, 55099 Mainz, Germany
An advanced method of producing metal-containing small molecules in the gas phase is based on laser ablation technique. The vaporized gas phase products can be investigated by means of millimeter/submillimeter-wave spectroscopy or by using high-resolution spectrometers in the visible frequency range. The experimental investigation is guided by high-level quantum chemical calculations performed at Mainz.
These experimental methods have been applied to measure AlO and AlS produced by laser ablation of solid aluminum and a dilution of N2O (2%) or H2S (7%) in helium. The adiabatically expanding gas mixture is probed by monochromatic radiation in the frequency range up to 400 GHz. Measurements reveal the hyperfine structure of both linear molecules to follow Hund’s case bβ S coupling due to the nuclear spin of aluminum. With the present measurements new highly accurate line positions for future observations and more accurate molecular parameters are available.