Abstract
The energy spectrum of the electrons ejected in forward direction from Ar atoms with simultaneous bound-state capture of two electrons has been measured by impact of 30 keV/amu ions with the aim to clarify the discrepancy between the results of two previous experiments concerning the existence of the cusp-shaped peak for electrons with velocity close to the ion velocity. A peak structure has been observed which is dominated by a broad cusp attributed to the zero-energy electron emission in the projectile-centered reference system at the excitation threshold of . Further narrower peaks have been identified as results of the decay of autodetachment resonant states of populated during the collision by three-electron bound-state capture.
- Received 29 August 2016
DOI:https://doi.org/10.1103/PhysRevA.94.042709
©2016 American Physical Society