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K X-ray satellites of lanthanum excited during the bombardment with 403 MeV nitrogen

The K X-ray satellite spectra of lanthanum have been measured using a high resolution crystal spectrometer during the bombardment with 403 MeV nitrogen ions. The nitrogen induced La K X-rays reveal a complex satellite structure. In order to investigate L and M subshell ionization probabilities in the case of 'fast' collisions the projectile velocity has been chosen higher than the velocity of L and M target electrons. For calibration and line profile checks the 'clean' La diagram K X-ray lines induced by the bombardment with 25 MeV protons have been measured as well. For interpretation the direct ionization probabilities have been calculated in the framework of the semiclassical separated atom approximation (SCA) using two different potentials, a variationally optimized and a hydrogenic potential.