Mainz 2017 – scientific programme
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MO: Fachverband Molekülphysik
MO 4: Spectroscopy of Cold Molecules and Complexes
MO 4.7: Talk
Monday, March 6, 2017, 18:30–18:45, N 25
High density source for slow and internally cold polar molecules reaching a collision limited regime — •Thomas Gantner, Manuel Koller, Xing Wu, Sotir Chervenkov, Martin Zeppenfeld, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
We present a new source for intense beams of slow and internally cold polyatomic molecules. By employing buffer gas cooling, an intense beam of molecules is achieved, reaching a single state purity of up to 92% [1]. Subsequently, the molecules are decelerated by a centrifuge decelerator [2] to a kinetic energy corresponding to less than 1 K. This combination produces cold guided molecules at fluxes exeeding 1010/s and densities of over 109/cm3. We thereby enter a regime where cold dipolar collisions can be observed directly in a quadrupole guide. Utilizing the technique for a range of molecules (ND3, CH3F, CHF3, CF3CCH, CH3OH, and C3H7OH) demonstrates its wide applicability.
[1] X. Wu et al., ChemPhysChem 2016, 17, 3631
[2] S. Chervenkov et al., Phys. Rev. Lett. 112, 013001 (2014)