Ionization reactions of metal hexafluorides with alkali atoms and dimers. [Thermal and epithermal energies]

Journal Article · Fri Jul 15 04:00:00 EDT 1977 · J. Chem. Phys.; (United States)

OSTI ID:7311842

Mathur, B P; Rothe, E W; Reck, G P

Ionization reactions are observed in crossed beams, usually of thermal energy, of alkalis and MoF/sub 6/, WF/sub 6/, and UF/sub 6/. Previous studies have indicated large electron affinities for these hexafluorides, and this is confirmed here. Ionization at thermal energies proceeds with the alkali dimers A/sub 2/ for the three hexafluorides, but with alkali atoms A only for UF/sub 6/. Several ionization paths are observed, allowing the deduction of molecular energies. A few experiments are done with eV-range beams. Lower limits for the electron affinities are 4.5, 3.3, 4.9, 4.3, and 1.9 eV for MoF/sub 6/, MoF/sub 5/, WF/sub 6/, UF/sub 6/, and UF/sub 5/, respectively. Possible mechanisms are discussed.

• Research Organization: Research Institute for Engineering Sciences and Department of Chemical Engineering, Wayne State University, Detroit, Michigan 48202
• OSTI ID: 7311842
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 67:2; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ACTINIDE COMPOUNDS
AFFINITY
ALKALI METALS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
ATOMIC BEAMS
BEAMS
CESIUM
COLLIDING BEAMS
COLLISIONS
DIMERS
ELECTRONEGATIVITY
ELEMENTS
ENERGY RANGE
EV RANGE
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IONIZATION
METALS
MILLI EV RANGE
MOLECULAR BEAMS
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
MOLYBDENUM COMPOUNDS
MOLYBDENUM FLUORIDES
POTASSIUM
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN FLUORIDES
URANIUM COMPOUNDS
URANIUM FLUORIDES
URANIUM HEXAFLUORIDE