Energy Shifts and Relative Intensities ofKX Rays Produced by Swift Heavy Ions

The energy shifts of Fe, Co, Zr, and Sn $K$ x rays produced by 5-MeV/amu He, C, O, Ne and 10 MeV/amu C ions depend nearly linearly on the stopping power for the bombarding ion. The shifts and the $\frac{K\beta }{K\alpha }$ ratios show a projectile energy dependence similar to that predicted for the $L$-ionization cross section. This suggests that these phenomena can be explained by existing Coulomb excitation theories.