Abstract
Complete double photoionisation spectra of methane, ammonia and water measured by the TOF-PEPECO method are reported. The electron pair energy distributions and low quantum yields suggest that for methane and ammonia the double photoionisation is mainly direct. In addition to the direct process, water undergoes two indirect dissociative double ionisation processes, one involving autoionisation of an oxygen atom in course of, or after, dissociation. The existence of these processes explains discrepancies between previous determinations of the ionisation threshold. Results on these and related species lead to a general conclusion that molecular double photoionisation in small molecules is mainly direct, whereas the same process in complex atoms is mainly indirect.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
