Auger Spectra of Carbon and Argon Following Ionization by Equal-VelocityαParticles and Deuterons

The spectra of carbon $K$- and argon $L$-shell Auger electrons resulting from ionization produced by 0.15-0.50-MeV/amu $\alpha$ particles and deuterons incident on a thin gas cell have been measured. Absolute ionization cross sections were obtained from the Auger-electron yields and, in addition, the yields obtained with equal-velocity projectiles were used to test the projectile $z$ dependence of the ionization process. Intense satellite structure was observed in the Auger spectra and these features were attributed to Auger transitions from multiple vacancy states formed during the collision.