Calculations of He(2 /sup 1,3/S)+H ionization cross sections using ab initio potentials and widths derived from Siegert eigenvalues

Journal Article · Sun Jul 01 00:00:00 EDT 1979 · J. Chem. Phys.; (United States)

OSTI ID:5988746

Isaacson, A D

Associative and Penning ionization cross sections are calculated for collisions of H atoms with He(2/sup 1/S) and He(2/sup 3/S) in the energy range 0.01--1.0 eV, using the classical theory of Miller. Ab initio potential energy curves V* and widths GAMMA recently obtained by the author from the variational calculation of the Siegert eigenvalues for these systems are used. Generally good agreement with the previous theoretical work of Hickman and Morgner is obtained. In addition, somewhat better agreement of the present results with the available experimental data, especially for the singlet total ionization cross section, demonstrates that the Siegert potentials and widths are reasonably accurate.

• Research Organization: Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 5988746
• Journal Information: J. Chem. Phys.; (United States), Vol. 71:1
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HELIUM
ATOM-ATOM COLLISIONS
HYDROGEN
CROSS SECTIONS
IONIZATION
PENNING EFFECT
ATOM COLLISIONS
COLLISIONS
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
NONMETALS
RARE GASES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena