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A: Fachverband Atomphysik
A 23: Ultra-cold atoms, ions and BEC I (with Q)
A 23.7: Vortrag
Mittwoch, 2. März 2016, 12:30–12:45, f107
Molecular ion formation in atom-ion three body recombination — •Amir Mohammadi, Artjom Krükow, Joschka Wolf, Amir Mahdian, and Johannes Hecker Denschlag — Universität Ulm, Institut für Quantenmaterie, Albert-Einstein-Allee 45, D-89069 Ulm, Deutschland
Producing transitionally and internally cold molecular ions is one of the challenges and long standing goals in cold atom-ion experiments.
One good strategy for this purpose is creating initially cold molecular ions by associating cold ions and cold atoms. In our hybrid atom-ion
experiment, we investigate the interaction of a laser-cooled trapped 138Ba ion with an ultracold cloud of 87Rb atoms. At very low
kinetic energies (i.e. sub-mK) and densities of 1012 cm−3, three-body atom-atom-ion recombination is the dominant reaction process
in our experiment[1]. It has been predicted [2] that a weakly bound BaRb+ ion should be the dominant molecular product. In this talk, we indeed report on the
first experimental observation of these molecules after three-body recombination. Furthermore, we discuss the effects of secondary and ternary collisions of BaRb+ with
cold Rb atoms.
[1] A. Krükow et al., arXiv:1510.04938 (2015)
[2] J.Pérez-Rios and C.H. Greene, The journal of Chemical Physics 143, 041105 (2015)