Collision dynamics of atom-molecule scattering via the crossed molecular beam technique: Hg+I2, K+CF3I

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Fluorocarbons, Iodine, Mercury (Metal), Molecular Beams, Potassium, Scattering Cross Sections, Angular Distribution, Atomic Collisions, Dissociation, Molecular Collisions, Nuclear Reactions

Scientific paper

The reaction of a velocity-selected K beam with a crossed beam of CF3I is studied via the velocity analysis technique. The observed KI product flux (velocity-angle) contour map, obtained at an average relative kinetic energy of 2.9 kcal mol/sec, is transformed to yield the center-of-mass detailed differential reaction cross section. The cross section is backward peaked, but there is a substantial reactive contribution in the forward hemisphere. The average recoil energy of the separating products is 8.5 kcal mol/sec. A nitrogen-seeded supersonic nozzle beam source of metastable mercury is described. Angular distributions of seeded nozzle beams of Hg scattered by a crossed thermal beam of iodine are measured. Crossed molecular beam experiments on the reactive scattering of ground state Hg by iodine are detailed. The qualitative topography of Hg and iodine potential surface is discussed.

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