Comparison of reagent translation and vibration on the dynamics of the endothermic reaction Sr+HF

Journal Article · Sun Jun 01 04:00:00 EDT 1980 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.439038· OSTI ID:5405898

Gupta, A; Perry, D S; Zare, R N

The endothermic reaction Sr+HF(v=0)..-->..SrF+H has been studied as a function of collision energy (4--14 kcal/mole) using a crossed beam geometry in which a seeded HF beam intersects a thermal Sr beam. At the same total energy this reaction is compared to the Sr+HF(v=1, J=1) reaction carried out under beam-gas conditions with a pulsed HF laser as the excitation source. In both cases the SrF products are detected by laser induced fluorescence. Using the Ba+HF..-->..BaF+H reaction as an internal reference, the cross section of the Sr+HF(v=1) reaction is found to be 1--10 times greater than for the Sr+HF(v=0) reaction when the same total energy is supplied as reagent translation. Product internal energy distribution and total relative cross sections as a function of collision energy are also measured. Phase space calculations are able to reproduce most of these results. This agreement and other arguments suggest that the Sr+HF reaction often proceeds via multiple encounters which scramble the reagent energy modes during the course of a reactive collision.

• Research Organization: Department of Chemistry, Stanford University, Stanford, California 94305
• OSTI ID: 5405898
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 72:11; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
ATOMIC BEAMS
BEAMS
CHEMICAL REACTIONS
COLLISIONS
ELEMENTS
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
METALS
MOLECULAR BEAMS
MOLECULE COLLISIONS
STRONTIUM