Hitting collisions between ions and linear molecules having a quadrupole moment

Rate coefficients k$_c$(j, m) for hitting collisions between ions of charge e and linear molecules of quadrupole moment q are calculated by the semi-classical adiabatic invariance method. The main results are presented in the form of two graphs of $\overline{k}_c/k_L$ against $\surd$ S, where $\overline{k}_c$ is the thermal average of the rate coefficients k$_c$(j, m), k$_L$ is the Langevin rate coefficient and S is a certain dimensionless parameter. The values of $\overline{k}_c$ for eq negative are greater than those for eq positive. A comparison is made with the measured rate coefficients of some proton and deuteron transfer reactions.