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The velocity spectra and cross sections of reactions of the type X*+D 2  → XD + +D (X + =Ar + , N 2  + , CO + ) have been found to be independent of the temperature of the target gas ( — 190° to 20°C). The additional forward scattering (as compared to spectator stripping) of the product ion at high energies cannot be explained by the thermal motion of the D 2  molecules. A recoil stripping mechanism is proposed. At low energies, an intermediate XD 2 * is postulated that lives shorter than half a period of rotation and is forward scattered but quickly equilibrates the excess energy among the vibrational degrees of freedom. The reactions of Ar +  and N 2  +  with CD 4  can well be understood by the stripping model over a wide range of energy. At low energies, no preferential forward scattering of the product ion is found as in the corresponding reactions with D 2 . The strongly unsymmetric broadening of the product ion band together with a small shift to lower velocities indicate a strong interaction of the incident ion with the CD 3  group at low energies. The formation of an intermediate complex XCD 4  +  which isotropically decays is expected at energies of a few tenth of one eV. Direct measurements at such low primary ion energies have not yet been possible.

Chemische Reaktionskinematik: IX. Abweichungen vom Stripping-Modell für Reaktionen X + + D 2 → XD + + D und X + + CD 4 → XD + + CD 3