Excitations during Collisionally-Induced Electron-Detachment of Negative Ions.
Abstract
This research has had its main thrust the detailed investigation of the electron loss processes of H- in collisions with neutral atoms (mainly He) and some measurements associated with projectile excitation in ion-atom collisions. Measurements have been made on the energy spectrum of detached electrons at a laboratory scattering angle of zero in coincidence with Lyman-alpha photons from the excitation and subsequent decay of H(2p) produced during the process, H- + He becoming H(2p) + e- + He*, at 0.5 MeV incident ion energy. It was found that this electron energy distribution mimics the so-called very sharp peak feature of the doubly differential cross section previously measured under e- and H coincidence conditions. This result shows that excitation of H is responsible for the very sharp peak and that the detached electron energy distribution associated with H(2p) is significantly different from the distribution associated with the production of H(1s).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1987
- Accession Number
- ADA182457
Entities
People
- M. G. Menendez
Organizations
- University of Georgia