Vibrational populations of N2(B3Πg) and CO(a3Π) produced by He+ impact on N2(X) and CO(X) in the 200-1000 eV energy range

High-resolution energy loss spectra (ELS) for the production of N2(B3 Pi g) and CO(a3 Pi ) in collisions of He+ on N2(X1 Sigma g+) and CO(X1 Sigma +) have been obtained in the 200 eV 500 eV, the authors invoke in the case of CO long-range charge dipole interactions that perturb the entrance channel prior to (and/or the exit channel after) the electronic transition. For E<500 eV the deviations from FC distributions in both the N2 and CO cases are tentatively attributed to perturbations caused by near-resonant charge exchange channels.