<i>Ab initio</i> study of the reactivity of ultracold RbSr+RbSr collisions

We performed ab initio calculations in order to assess the reactivity of ultracold RbSr ($^2\Sigma^+$) $+$ collisions occurring on singlet as well triplet potential. At energies reactions are energetically possible if they release energy, i.e., exoergic. The exoergicity between molecules producing diatomic known experimentally. extend this triatomic by calculating binding energy reaction products. find that, addition formation Rb$_2$+2Sr and Rb$_2$+Sr$_2$ collisions, also Sr$_2$Rb+Rb Rb$_2$Sr+Sr both is Hence, these products collisions. For all exoergic larger than 1000 cm$^{-1}$. barrierless qualitative paths leading show that a path with at most submerged barrier exists for creation product. Because existence we expect result almost-universal loss even Our results can be contrasted alkali-diatoms, where endoergic, SrF molecules, during only spin-forbidden SrF$_2$