Accession Number:

AD0601879

Title:

A CALCULATION OF THE PHONON FREQUENCIES IN SODIUM.

Descriptive Note:

Technical rept. no. 18

Corporate Author:

CALIFORNIA UNIV SAN DIEGO LA JOLLA

Personal Author(s):

Report Date:

1964-04-09

Pagination or Media Count:

32.0

Abstract:

The phonon spectrum of sodium is calculated in the harmonic approximation. The effective interaction between the ions is separated into direct two-body forces between bare ions and effective attraction due to the presence of conduction electrons. Careful treatment of the two phonon processes includes the calculation of the electron-phonon scattering based on the pseudo-potential method and the screening effects due to the interaction between electrons by the Hartree-Fock approximation with a screened exchange potential. Comparison of the results for sodium with neutron diffraction measurements and a previous calculation by Toya shows good agreement on the whole. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE