Abstract
We report on an experimental and theoretical systematic study of double ionization of helium by ion impact in terms of four-particle Dalitz plots. Several collision systems covering a broad range of perturbation parameters $\ensuremath{\eta}$ (projectile charge to speed ratio) were investigated. With increasing $\ensuremath{\eta}$ we observe a systematic trend from features, characteristic to correlated double-ionization mechanisms, to signatures of higher-order processes not requiring electron-electron correlations [the mechanism called ``two-step--two projectile-electron interaction'' (TS-2)]. The data for the largest $\ensuremath{\eta}$ can qualitatively be amazingly well described by a simple model only including the TS-2 mechanism.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.