The single- and double-electron detachment processes have been studied for 85 keV [Formula Presented] on He collisions measuring the energy spectra of the electrons emitted in forward direction. In the spectrum belonging to the single-electron loss (SEL) the nonresonant part (cusp) has been resolved from the resonant part [lines from the (2s2p[Formula Presented] shape resonance of [Formula Presented]]. The ratio of the integrated yield of the double-electron loss (DEL) to that of SEL was found to be 0.36±0.02. The yield of the cusp in the SEL spectrum was found to be surprisingly small, only (70±20)% of the yield of the cusp in the DEL spectrum. The formation of the cusp in SEL is interpreted as a result of dipolar interaction between the electron and the outgoing [Formula Presented] atom.
|Number of pages||8|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - Jan 1 1996|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics