Abstract
Experimental measurements of absolute cross sections are presented for electron-impact single ionization of and . The incident electron energies range from below threshold to 1500 eV. The measurements were performed using the crossed ion-electron beams apparatus at the Oak Ridge National Laboratory Electron-Cyclotron Resonance Ion-Source Facility. The data are in reasonable agreement with cross sections calculated using the Lotz semiempirical formula. Reduced cross sections for the isoelectronic targets, and , are compared in order to test classical scaling for direct electron-impact single ionization.
- Received 23 February 1994
DOI:https://doi.org/10.1103/PhysRevA.50.1377
©1994 American Physical Society