Abstract
Presented here are experimental results of a study of the systematics of electron emission from discrete states of He and as produced by , , , and He impacts. The results were obtained by energy analysis of the electrons emitted at angles of 10° to 160°. Projectile energies ranged from 20 to 150 keV. Differential and integrated cross sections are presented for emission of electrons from the , , the sum of the and autoionizing levels of He, and the autodetaching level of . The cross section is nearly isotropic, while the and cross sections are in general anisotropic. The ratios of the to the cross sections follow an approximate form. The peak arising from the level has an asymmetric profile with a positive value which increases as the projectile energy decreases.
- Received 10 October 1972
DOI:https://doi.org/10.1103/PhysRevA.7.560
©1973 American Physical Society