Abstract

The influence of the projectile trajectory on the K-shell ionization probability has been investigated by proton and deuteron impact on Ni and Ag by using particle-photon coincidence techniques. Good agreement with calculations in first order peturbation theory is obtained also at very large scattering angles, where higher multipole transitions and the recoil effect have an important influence on the ionization probability. The importance of the increased K-electron binding energy due to the influence of the projectile nuclear charge is demonstrated in the Ne on Ni and Cl on Pb collision systems. Even in the Cl on Pb collision system good agreement is obtained between the first order peturbation theory and experiment, if relativistic united-atom wave functions are used for the 1s electrons.

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