Product magnetic deflection slotted disk velocity analysis molecular beams kinetics: Li+Cl/sub 2/, Br/sub 2/, and ICl
An inhomogeneous deflecting magnet and slotted disk velocity analyzer combination has been used to deflect aside nonreactively scattered Li atoms and thereby measure velocity distributions of LiBr and LiCl reactively scattered from crossed thermal beams of Li and Br/sub 2/ or Cl/sub 2/. Transformation of these data into the center-of-mass coordinate system provides contour maps of the differential reactive cross sections which indicate that the Li+Br/sub 2/ and the Li+Cl/sub 2/ reactions have the following features in common: (a) The reaction mechanisms are direct; (b) The product angular distributions are broad although foward scattering is preferred (i.e., LiX scattered in the direction of the Li velocity); (c) Small product recoil energies are most probable but the product recoil energy distributions have a long tail. There is a strong coupling of the product recoil angle and energy distributions for Li+Cl/sub 2/..-->..LiCl+Cl with forward scattering favoring higher product recoil energy; however, this coupling phenomenon is weak or nonexistent for the Li+Br/sub 2/..-->..LiBr+Br reaction. Semiquantitative observations are also presented for the Li+ICl reaction. These results are discussed in relation to previous experimental and theoretical work on the reactions of alkali atoms with halogen molecules. (AIP)
- Research Organization:
- Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Chemistry, University of California, Berkeley, California 94720
- OSTI ID:
- 7147638
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 65:8; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METALS
BEAM ANALYZERS
BEAMS
BROMINE
CHEMICAL REACTION KINETICS
CHLORIDES
CHLORINE
CHLORINE COMPOUNDS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HALOGENS
IODINE CHLORIDES
IODINE COMPOUNDS
KINETICS
LITHIUM
MAGNETIC ANALYZERS
METALS
MOLECULAR BEAMS
NONMETALS
REACTION KINETICS
VELOCITY