Argon and krypton x-ray production by fluorine projectiles of different charge states

Kr K, Kr L, and Ar K x-ray yields have been measured for excitation by 36- and 48-MeV fluorine ions in +6 to +9 charge states. The significant decrease in the dependence of the target x-ray yields on the projectile charge state, which is observed as the parameter Z₁Z₂ is decreased, is in agreement with theoretical expectations.