Accession Number:

AD0750768

Title:

Improved Calculations of X-Ray Coherent and Incoherent Scattering Cross-Sections.

Descriptive Note:

Semiannual progress rept. 1 Mar-1 Sep 72,

Corporate Author:

POLYTECHNIC INST OF BROOKLYN N Y DEPT OF PHYSICS

Personal Author(s):

Report Date:

1972-09-01

Pagination or Media Count:

21.0

Abstract:

Progress is described in four areas of research. For large atoms a code has been developed to calculate profiles from numerical Hartree-Fock wave functions. Relativistic Compton profiles have been calculated for the first time. Non-relativistic and relativistic profile calculations for gadolinium are presented. Exact hydrogenic K-shell and L-shell calculations were performed. Impulse incoherent scattering factors were shown to be greatly improved over conventional Waller-Hartree calculations for strong binding or the case of low momentum transfers. A direct variational principle to calculate coherent factors has been employed in the two-electron atom ground state isoelectronic sequence and very accurate results have been obtained using a simple trial wave function.

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE