Projectile Energy Dependence of Aluminum and Silicon Ka X-Ray Satellites.
Abstract
The K alpha satellite spectra of aluminum and silicon produced by collisions with 5.4 to 40.6 MeV helium ions, 12.0 to 74.1 MeV carbon ions, and 23.4 to 117.0 MeV neon ions have been measured. The apparent average L-vacancy fractions (P sub L) determined from the relative intensities of the satellite peaks were observed to be dependent on the projectile energy and atomic number and on the target atomic number. Comparisons of the binary-encounter approximation (BEA) and semiclassical approximation (SCA) predictions with the experimental PL values as a function of the projectile-to-L-shell electron velocity ratio for helium on aluminum are presented. It was found that the BEA greatly over-predicted the degree of L-shell ionization and failed to accurately predict the shape of the velocity dependence. The SCA predicted the shape of the dependence at the higher velocities but was too low in magnitude. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1978
- Accession Number
- ADA064077
Entities
People
- Blake Isamu Sonobe
Organizations
- Air Force Institute of Technology