Three-body reaction dynamics in electron-ion dissociative recombination

Dissociative recombination of molecular ions with electrons is the most imp ortant neutralising process in a plasma cold enough to contain molecules. T he basic features of recombination of diatomic molecular ions are by now qu ite well explained, whereas recombination of polyatomic ions is much less w ell understood. Experiments during the last five years at ion storage rings have shown that triatomic molecular ions tend to break up into three atoms upon recombination with electrons. Very recently the question of how this break-up occurs has started to be addressed by the use of particle imaging techniques at ion storage rings. In this article we will discuss results fo r and H2O+ H-3(+).