Projectile Charge-State Dependence ofNe K-Shell Ionization and Fluorescence Yield in 50-MeVCln++NeCollisions

Abstract

$\mathrm{Ne} K$ x-ray and Auger-electron production cross sections have been measured in 50-MeV Cl + Ne collisions for incident charge states of 5+ to 15+. The ionization cross section and mean fluorescence yield were derived from the data. A factor 20 rise in the x-ray cross section over the charge-state range studied is primarily due to a factor 7.2 increase in the mean fluorescence yield. The factor 2.8 rise in the ionization cross section can be explained by a decreased screening of the projectile nuclear charge.