Penning ionization of H/sub 2/ by He(2 /sup 3/S): Quantum mechanical scattering calculations within the rigid-rotor approximation
Elastic, rotationally inelastic, and total ionization cross sections have been calculated quantum mechanically for the scattering of metastable He(2 /sup 3/S) atoms by H/sub 2/ in the energy range 0.010--0.500 eV. The potential surface V* and autoionization width GAMMA previously calculated by the authors were used. The scattering calculation was based on the Arthurs and Dalgarno formalism for the scattering of an atom by a rigid rotator. The coupled channel equations were solved numerically for the complex, angularly dependent potential V*-(i/2) GAMMA. The results show that the total ionization cross section sigma/sub i/ increases sharply with energy. Hence the ionization rate constant has a strong temperature dependence. The calculated rate constants are in good agreement with the experimental results of Lindinger et al. (AIP)
- Research Organization:
- Department of Chemistry, and Materials and Molecular Research Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
- OSTI ID:
- 7112396
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 66:4; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY RANGE
EV RANGE
FLUIDS
HELIUM
HYDROGEN
IONIZATION
MILLI EV RANGE
MOLECULE COLLISIONS
NONMETALS
PENNING EFFECT
RARE GASES