Z dependence of K α x-ray satellite structure in heavy-ion-atom collisions

The spectra of K α x rays emitted as a result of heavy-ion-atom collisions have been measured with a Bragg spectrometer using a variety of equal velocity (1.7 MeV/amu) heavy ions ranging from ₁H to ₁₈Ar incident on solid targets containing atoms of ₁₃Al, ₁₇Cl, and ₁₉K. In the cases of Cl and K, the measured K α_1,2-K α satellite energy differences for one through seven L-shell vacancies were found to be systematically larger than those calculated using the Herman-Skillman Hartree-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 K α_1,2 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.