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

The spectra of $K \ensuremath{\alpha}$ 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 $_{1}\mathrm{H}$ to $_{18}\mathrm{Ar}$ incident on solid targets containing atoms of $_{13}\mathrm{Al}$, $_{17}\mathrm{Cl}$, and $_{19}\mathrm{K}$. In the cases of Cl and K, the measured $K {\ensuremath{\alpha}}_{1,2}\ensuremath{-}K \ensuremath{\alpha}$ 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 $K {\ensuremath{\alpha}}_{1,2}$ 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.