No abstract

No abstract

No abstract

No abstract

In this paper, a systematic study of x-ray production in ion-atom collisions is presented for electron promotion by both 3do. and 4fo molecular orbitals. L x-ray production cross sections and highresolution L x-ray spectral measurements are presented for P+, 8+, Cl+, Ar+, and K+ projectiles incident on Ar and CH, gas targets for projectile energies between 15 and 200 keV. Average values of the fluorescence yield and total L-shell ionization cross sections are determined. A dramatic Z dependence observed in the x-ray production cross section is attributed to changes in fluorescence yield.Theoretical calculations of fluorescence yield are found not to agree with experimentally determined values. Finally, inner-shell vacancy production by 3do. electron promotion is found to be much less efficient than 4fa. electron promotion for the co)lision systems studied in this paper.