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Excitation of continuum radiation in collisions of (1) electrons and (2) metastable argon atoms with H/sub 2/ and D/sub 2/

Journal Article · · J. Chem. Phys.; (United States)
OSTI ID:5671098
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Measurements have been made of the spectral distribution of continuum radiation arising from collisions of low energy electrons and of metastable (/sup 3/P/sub 0,2/) argon atoms with hydrogen and deuterium molecules. The electron impact spectra, a(/sup 3/..sigma../sup +//sub g/, v' = 0) ..-->.. b(/sup 3/..sigma../sup +//sub u/)+h..nu.., are in good agreement with the calculations of James and Coolidge. The spectra originating from Ar*+H/sub 2/, D/sub 2/ were obtained using crossed supersonic beams. In both cases, an onset at 0.065 +- 0.009 eV relative collision energy was observed. For deuterium, this onset occurs below the energy required to produce D/sub 2/(a /sup 3/..sigma../sup +//sub g/) . Calculations of the spectral distributions when compared to experiment showed that, at 0.07 eV, the observed radiation arises from the first two vibrational levels of ArD* in the ratio (v' = 0)/(v' = 1) = 4. For hydrogen at this energy, both product channels are present in the ratio ArH*/H(/sub 2/ = 2 . At higher energy, both product channels are found in both systems with D(/sub 2/ predominating in the case of D/sub 2/ and ArH* in the case of H/sub 2/.
Research Organization:
Department of Chemistry, University of Florida, Gainesville, Florida 32611
OSTI ID:
5671098
Journal Information:
J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 83:1; ISSN JCPSA
Country of Publication:
United States
Language:
English

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Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
DEUTERIUM
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GASES
HYDROGEN
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
METASTABLE STATES
MOLECULE COLLISIONS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
RARE GASES
STABLE ISOTOPES