Reactive collisions of trapped anions with ultracold atoms

Abstract

We present a scheme to embed molecular anions in a gas of ultracold rubidium atoms as a route towards the preparation of cold molecular ions by collisional cooling with ultracold atoms. Associative detachment as an important loss process in collisions between OH- molecules and rubidium atoms is studied. The density distribution of trapped negative ions in the multipole radiofrequency trap is measured by photodetachment tomography, which allows us to derive absolute rate coefficients for the process. We define a regime where translational and internal cooling of molecular ions embedded into the ultracold atomic cloud can be achieved.

References in corpus (4)

• A trapped single ion inside a Bose-Einstein condensate
• Ultracold Rb-OH collisions and prospects for sympathetic cooling
• Photodetachment of cold OH- in a multipole ion trap
• Evaporation of buffer gas-thermalized anions out of a multipole rf ion trap

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• Ab initio electronic structure of the Sr${}_2^{+}$ molecular ion
• Charge Exchange Dynamics in Cold Collisions of ${}^{40}$CaH${}^{+}$ and ${}^{39}$K
• Cold interactions and chemical reactions of linear polyatomic anions with alkali-metal and alkaline-earth-metal atoms