Study on fragmentation dynamics of NH32+ induced by electron impact

In this study, the fragmentation dynamics of ammonia are investigated using the 205-eV electrons impact ionization by a reaction microscope. The two- and three-body dissociation channels of NH32+ ions are identified by the coincidence measurement of fragment ions, and the dication electronic states are determined. In the three-body dissociation channel, including the Dalitz plots and Newton diagrams, the partitioning of the neutral hydrogen's energy provides a deeper understanding of the fragmentation mechanisms. Using the energy of hydrogen as a filter, the discovery of two electronic states provides a more specific explanation of the mechanism of the direct dissociation process. By employing the kinetic energy (KE) of fragments, the mechanisms of three-body dissociation channels have been further validated. This study provides more detailed information for subsequent research on the dissociation dynamics of ammonia.