The post-foil emission of Ne Kα X-rays at 4 MeV is well described by a statistical population of states and implies an L-electron population diminished from that indicated by the measured equilibrium charge state distribution.

We have measured projectile and target x-ray cross sections for F + Ar and F + Kr collisions using fluorine beams of charge states 7 +, 8 +, and 9+ with energies from 20 to 76 MeV. Pronounced enhancements for the Ar $K$ and Kr $L$ vacancy cross sections using ${\mathrm{F}}^{9+}$ ions compared to those for the 7+ projectile can be explained by charge exchange as described by an empirically scaled Brinkman-Kramers theory. The Ar $L$, Kr $K$ and Kr $M$ cross sections are found to exhibit features expected for Coulomb ionization. The projectile $K$ x-ray production for the 9+ ion is accounted for by charge exchange processes. Predictions of the first Born approximation for direct single-step excitation to bound states by the target nucleus overestimate the observed cross sections for ${\mathrm{F}}^{7+}$ and ${\mathrm{F}}^{8+}$.

The $K\ensuremath{\alpha}$ x-ray satellite intensities were measured with proton impact at a scaled velocity (relative to that of the $L$-shell electron) ${V}_{L}=2.1$ for $Z=13\ensuremath{-}20$ and ${V}_{L}=1.0$ for $Z=20\ensuremath{-}26$. The intensity ratios $\frac{{I}_{K,1L}}{{I}_{K,0L}}$ are found to be well characterized by multiple-Coulomb ionization predictions. Taking into account the fluorescence yields, the comparisons of the measured intensity ratio with the corresponding ratio of theoretical vacancy cross sections yield a set of empirical vacancy-rearrangement correction factors. Theoretical estimates of these factors based on the atomic transition rates of McGuire are in reasonable over-all agreement with the extracted values.

The empirically scaled Brinkman-Kramers expression for charge exchange is found to account for the enhancement in target $K$ x-ray production for fully stripped projectiles over that for two-electron projectiles even for collision partners as heavy as Cl on Kr.

The yields for sulfur, scandium, iron, and copper $K$ x rays produced in collisions with oxygen and fluorine projectiles have been measured over a large range of impact velocities (${\ensuremath{\eta}}^{\frac{1}{2}}\ensuremath{\simeq}0.2\ensuremath{-}0.8$). These yields, when scaled by the corresponding velocity-matched protoninduced yields, $\frac{\ensuremath{\sigma}(Z)}{{Z}^{2}\ensuremath{\sigma}(1)}$, all cross the unity value at ${\ensuremath{\eta}}^{\frac{1}{2}}$ above the values suggested in a previous theoretical paper but do approach increased-binding predictions with decreasing ${\ensuremath{\eta}}^{\frac{1}{2}}$.

The empirically scaled Brinkman-Kramers expression for charge exchange is found to account for the enhancement in target K x-ray production for fully stripped projectiles over that for two-electron projectiles even for collision partners as heavy as Cl on Kr.

Relative K-shell ionization cross sections of Cl and Ca measured with 200 keV/amu singly ionized projectiles of 2H, 4He, 12C, 14N, 16O and 20Ne exhibit features which are adequately described by the combination of binding effect in Coulomb ionization and charge exchange to the empty orbitals of the projectile.

Relative $K$-shell ionization cross sections were measured for 7.1-MeV/amu projectiles of ${\mathrm{He}}^{2+}$, ${\mathrm{B}}^{5+}$, ${\mathrm{C}}^{6+}$, ${\mathrm{N}}^{7+}$, ${\mathrm{O}}^{8+}$, ${\mathrm{F}}^{9+}$, and ${\mathrm{Ne}}^{10+}$ on targets of Ca, Fe, Y, and Cd. The scaled cross section ratios $R=\frac{[4\ensuremath{\sigma}({Z}_{1})]}{[Z_{1}^{}{}_{}{}^{2}\ensuremath{\sigma}(2)]}$ exhibit linear ${Z}_{1}$ dependence characteristic of the effects of increased binding of target electrons and polarization. The absence of higher-order ${Z}_{1}$ dependence suggests that the contributions to the ionization $\ensuremath{\sigma}$ by charge exchange to the empty orbitals of the projectile are relatively small.

Relative K-shell ionization cross sections of Cl and Ca measured with 200 keV/amu singly ionized projectiles of 2H, 4He, 12C, 14N, 16O and 20Ne exhibit features which are adequately described by the combination of binding effect in Coulomb ionization and charge exchange to the empty orbitals of the projectile.

Ratios of double (KL) to single (K) ionization cross sections for proton and α-particle impact on vanadium are measured with velocities V = 0.53 to 1.7 (in units relative to the L-shell electron velocity) and are found to be reproduced by the recipe of McGuire and Richard.