Correlations between charge-changing interactions and projectileKαx-ray emission in Ar + Xe collisions

Atomic inner-shell processes involving excitation, ionization, and charge transfer have been investigated for MeV/amu Ar+Xe collisions. The individual processes were isolated and identified by detecting coincidences between argon $K$ x rays and the outgoing projectile charge states of interest. Measurements were made for 160- and 180-MeV argon ions with incident charge states $q=14,15, \mathrm{and} 17$ colliding with Xe target atoms under single-collision conditions. Cross sections for argon $K$ x rays coincident with the outgoing projectile charge states $q-1\mathrm{}$, $q+1\mathrm{}$, and $q+2\mathrm{}$ were measured, as well as cross sections for total $K\alpha$ x-ray production and total single-electron capture. The data indicate that nearly 50% of the x rays emitted by the projectile are associated with some kind of charge-changing event. For $K$ x rays coincident with single-electron capture it is expected that the recently discovered process of resonant transfer and excitation contributes to the measured cross section.