Ion-beam experiments probe fundamentals of hydronium–hydroxide neutralisation

The detailed reaction mechanisms by which isolated hydronium and hydroxide ions neutralise each other have been observed by Israeli and Swedish research groups in ion-beam experiments. The results differ from what we expect to occur in liquid water, but could help guide future investigations into what is one of the most fundamental chemical reactions. The findings could also improve our understanding of the chemistry of the ionosphere and interstellar medium.