Vibrational quenching and reactive processes of weakly bound molecular ions colliding with atoms at cold temperatures

We present a study about vibrational quenching and chemical processes of cold molecular ions immersed in an ultracold atomic gas. In particular, the quasiclassical trajectory method is applied to BaRb+(v)+Rb collisions at T1mK, revealing a large vibrational quenching cross section, which follows the Langevin capture model prediction. These results play a key role in the understanding of relaxation phenomena of cold molecular ions in ultracold gases.