Abstract
Argon x-ray satellites produced by ion collisions have been analyzed in high resolution. Ions of H, C, N, O, F, Si, and Cl with energies in the range 1-5 MeV/amu were used to bombard argon contained in a gas cell. This study is the first systematic study of x-ray satellites from free-atom targets with . The relative satellite intensities and satellite energies are tabulated and their projectile dependence is qualitatively discussed. The average number of -shell vacancies formed in single--vacancy-producing collisions is determined from a model calculation based on theoretical decay rates. This model includes (i) the variation in fluorescence yield, and (ii) the variation in -shell rearrangement with the number of -shell and -shell electrons. The averages obtained from the model calculation are nearly the same as the values obtained by weighting the x-ray satellites equally. A universal scaling of in and projectile velocity is obtained on the basis of an increased binding effect. This is the first successful demonstration of a scaling law for multiple ionization by heavy ions.
- Received 14 November 1977
DOI:https://doi.org/10.1103/PhysRevA.18.1892
©1978 American Physical Society