Heidelberg 2015 – scientific programme
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MO: Fachverband Molekülphysik
MO 21: Posters 4: Novelties in Molecular Physics
MO 21.13: Poster
Thursday, March 26, 2015, 17:00–19:00, C/Foyer
High resolution spectroscopy on LiSr — •Erik Schwanke1, Asen Pashov2, Alexander Stein1, Horst Knöckel1, and Eberhard Tiemann1 — 1QUEST und Inst. f. Quantenoptik, Leibniz Universität Hannover — 2Department of Physics, Sofia University, Sofia, Bulgaria
The mixed alkali-alkaline earth molecules have recently attracted the interest of the scientific community due to possible applications in the field of cold and ultracold molecules. The combination of alkaline and alkaline earth atoms leads to molecules which have permanent electric and magnetic dipole moments and thus offer manipulation of their states by external fields. Several ab initio calculations have been published on atomic combinations like LiCa, LiSr or RbSr by various groups, reflecting the high interest by experimentalists. Experimentally, not so much is known about molecular electronic states. Up to now the ground state and two electronically excited states of LiCa and few states of LiBa have been characterised. We have successfully recorded the near infrared spectrum of LiSr. The molecules were created in a three section-heatpipe with different temperatures, this way accounting for the different vapour pressures. The thermal emission was dispersed by a high resolution Fourier transform spectrometer. The assignment of the dense spectrum was made possible by shining a diode laser tuned to a molecular line into the sample. This approach allowed to find and assign those transitions connected with the laser excitation. A first assignment of lines will allow predictions for further measurements. We will report the status of the investigations.