The
rate coefficients of rotationally inelastic collision processes
for N2–HF as well as N2–DF systems
were calculated by applying the recently developed coupled-states
approximation including the nearest neighbor Coriolis couplings approach,
based on the full-dimensional ab initio intermolecular
potential energy surface. It was found that the energy gap law governs
these energy transfer processes. For rotational quenching of N2 (j
1 = 2–10) by the ground
rotational state of HF, j
1 = 6 and 5 have
the maximum quenching rate for ortho-N2 and para-N2, respectively. Quenching
rate coefficients for initially excited HF and DF (j
2 = 1) in collisions with N2 were also reported,
where N2–DF has a larger quenching rate than N2–HF due to larger density of states of the N2–DF system.