  The H+LiF(X 1Sigma+,v=0-2,j=0)-->HF(X 1Sigma+,v',j')+Li(2S) bimolecular
process is investigated by means of quantum scattering calculations on the
chemically accurate X 2A' LiHF potential energy surface of Aguado et al. [J.
Chem. Phys. 119, 10088 (2003)]. Calculations have been performed for zero total
angular momentum for translational energies from 10-7 to 10-1 eV. Initial-state
selected reaction probabilities and cross sections are characterized by
resonances originating from the decay of metastable states of the H...F-Li and
Li...F-H van der Waals complexes. Extensive assignment of the resonances has
been carried out by performing quasibound states calculations in the entrance
and exit channel wells. Chemical reactivity is found to be significantly
enhanced by vibrational excitation at low temperatures, although reactivity
appears much less favorable than non-reactive processes due to the inefficient
tunneling of the relatively heavy fluorine atom strongly bound in van der Waals
complexes.
