Accession Number:

AD0613929

Title:

DIFFERENTIAL CROSS SECTIONS FOR ELECTRONS ELASTICALLY SCATTERED BY HELIUM ATOMS,

Descriptive Note:

Corporate Author:

QUEEN'S UNIV BELFAST (NORTHERN IRELAND) DEPT OF APPLIED MATHEMATICS

Personal Author(s):

Report Date:

1965-01-01

Pagination or Media Count:

12.0

Abstract:

The differential cross sections for the elastic scattering of electrons by helium atoms at a few selected electron impact energies, in the 10-50 eV energy range, are calculated by using the adiabatic-exchange phase shifts of Labhan and Callaway 1964 for the l 0, 1 and 2 partial waves, and the static-dipole phase shifts for the higher partial waves. The calculated values are in satisfactory accord with the experimental data of Bullard and Massey 1931 and of Hughes, McMillen and Webb 1932 and with the theoretical values of Khare and Moiseiwitsch 1965, who included exchange only indirectly. The effect of quadrupole polarizability potential on the differential cross sections is also examined and is found to be small. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE