In high-velocity ion-atom single collisions, a strong dependence of target x-ray production cross sections upon the ionic charge state has been observed. Experiments were performed in thin gas targets of argon, krypton, and xenon with 35.7-MeV fluorine ions incident in charge states +5 to +9. Production cross sections for Ar K, Kr L, and Xe L characteristic lines increase by as much as a factor of 5 with increasing incident charge state but cannot be fitted by a q 2 dependence.
The spectra of Ka x rays emitted as a result of heavy-ionatom collisions have been measured with a Bragg spectrometer using a variety of equal velocity (1.7 MeV/amu) heavy ions ranging from, H to , SAr incident on solid targets containing atoms of »Al, »Cl, and»K. In the cases of Cl and K, the measured Kal, -Ka satellite energy differences for one through seven L-shell vacancies were found to be systematically larger than those calculated using the Herman-SkillmanHartree-Fock-Slater program.Values of the binomial probability parameter obtained by fitting the relative satellite intensities with binomial distributions have been compared to theoretical values calculated using an impact-parameter formulation of the binary-encounter approximation. In the Al spectra obtained with S and Ar ions, the Ka» peak is observed to have an intensity six to seven times larger than is expected on the basis of a binomial fit to the satellite peaks.
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