Evolution of Projectile Double-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>K</mml:mi></mml:math>-Vacancy Fractions with Target Thickness in Ion-Atom Collisions

Abstract

The dependence of projectile double-$K$-vacancy (hypersatellite) x-ray yields on target thickness for ions moving in thin solid targets is examined. For 2.3-MeV/amu Cl ions incident on C foils, the double- to single-$K$-vacancy x-ray yield ratio increases by a factor of 3.5 over the range of thicknesses investigated, reaching values as high as 0.3. A quantitative explanation of the observed results is obtained using a formulation based on $K$-vacancy production and filling cross sections.