Projectile L-Auger electrons were measured with high resolution in collision of 91.6 MeV Arq+ on gaseous target atoms (H2, He, Ne). Kinematic (Doppler) broadening effects were significantly reduced by observing the Auger electrons at an angle of zero degrees. Light target atoms were used to avoid considerable changes in the outer shell of the projectile during L-shell ionisation. Thus, the predominant excitations of the configurations 1s22s22p53s23p and 1s22s22p53s2 are achieved for incident Ar5+ and Ar6+, respectively.
