Step-by-step state-selective tracking of fragmentation dynamics of water dications by momentum imaging.

ABSTRACT: The double photoionization of a molecule by one photon ejects two electrons and typically creates an unstable dication. Observing the subsequent fragmentation products in coincidence can reveal a surprisingly detailed picture of the dynamics. Determining the time evolution and quantum mechanical states involved leads to deeper understanding of molecular dynamics. Here in a combined experimental and theoretical study, we unambiguously separate the sequential breakup via D⁺ + OD⁺ intermediates, from other processes leading to the same D⁺ + D⁺ + O final products of double ionization of water by a single photon. Moreover, we experimentally identify, separate, and follow step by step, two pathways involving the b ¹Σ⁺ and a ¹

SUBMITTER: Severt T 

PROVIDER: S-EPMC9437093 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature