Potential model for the elastic scattering of electrons by helium at intermediate energies

Journal Article · Thu Jul 01 04:00:00 EDT 1976 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.432780· OSTI ID:7350559

Paikeday, J M

Differential scattering cross section of electrons scattered elastically by helium atoms is computed using a model potential constructed from the Hartree--Fock wavefunction of Roothan, Sachs, and Weiss and a three parameter phenomenological potential to account for the effects of long range polarization effects and nonlocal dynamic effects. The results are in good agreement with the recently published experimental data of Bromberg. The calculated values of the partial wave phase shifts agree with those of Ganas, Dutta, and Green and LaBahn and Callaway for angular momentum in the range 0-(0.25+0.31r) e/sup -2/./sup 8//subr/-..cap alpha../subd/(1+e/sup -8//subr/)(r/sup 4/+(1.3+E/350)/sup 4/)/sup -1/. The forward scattering amplitudes calculated from this model and corrected for electron exchange scattering compare favorably with the results of dispersion relation and eikonal optical model theories. (AIP)

• Research Organization: Southeast Missouri State University, Cape Girardeau, Missouri 63701
• OSTI ID: 7350559
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 65:1; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
FLUIDS
HARTREE-FOCK METHOD
HELIUM
INTERATOMIC FORCES
MATHEMATICAL MODELS
NONMETALS
RARE GASES
SCATTERING