Chemical reactivity of ultracold polar molecules: investigation of H+HCl and H+DCl collisions
Department of Chemistry, University of Nevada Las Vegas,
4505 Maryland Parkway, Las Vegas NV 89154, USA
Published online: 10 August 2004
Quantum scattering calculations are reported for the and collisions for vibrational levels of the diatoms. Calculations were performed for incident kinetic energies in the range , for total angular momentum J=0 and s-wave scattering in the entrance channel of the collisions. Cross-sections and rate coefficients are characterized by resonance structures due to quasibound states associated with the formation of the HHCl and HDCl van der Waals complexes in the incident channel. For the collision for v=1,2, reactive scattering leading to formation is found to dominate over non-reactive vibrational quenching in the ultracold regime. Vibrational excitation of HCl from v=0 to v=2 increases the zero-temperature limiting rate coefficient by about 8 orders of magnitude.
PACS: 34.50.-s – Scattering of atoms and molecules / 34.50.Ez – Rotational and vibrational energy transfer / 34.50.Pi – State-to-state scattering analyses
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004