Abstract
The release of the highly reactive radical from the fragmentation of water by electron impact is made mostly through the channel. This channel ejects suprathermal ions with a kinetic energy distribution whose details are unexplored so far due to the difficulty in experimentally characterizing ions ejected with very low kinetic energy without another charged partner. These ions are studied here using the delayed extraction time-of-flight technique (DETOF). The structures and substructures in the kinetic energy distribution of associated with both single and double ionization are identified qualitatively and quantitatively. A comparison with the kinetic energy distribution of the complementary channel , also originating from vacancies in the orbital, shows marked differences between the two, mainly regarding the relative role between the fragmentation involving the ground state or via transitions to repulsive states.
- Received 11 May 2017
DOI:https://doi.org/10.1103/PhysRevA.96.012705
©2017 American Physical Society