T. Ruhaltinger et al., COLLISIONAL EXCITATION OF VERY HIGH ROTATIONAL LEVELS OF HF IN SMALL-ANGLE SCATTERING WITH HE-50 EV( AT E(LAB)=25), The Journal of chemical physics, 100(12), 1994, pp. 8877-8883
Energy loss distributions of He+ ions after collisions with HF molecul
es in a secondary beam at laboratory collision energies in the range 2
5-50 eV show a regular structure indicating rotational excitation up t
o Delta J=35 with no clear evidence for vibrational excitation. The ob
served propensity for large Delta J transitions decreases with increas
ing collision energy but increases with increase in scattering angle.
Three dimensional quasiclassical trajectory calculations using a poten
tial energy surface based on the He+-Ne interaction at short range and
a damped long range ion-dipole (quadrupole) interaction reproduce all
the essential features of the experimental results.