Accession Number : AD0723191

Title :   Computer Programs for the Analysis of the Broadening of X-Ray Powder Patterns.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Metzbower,E. A.

Report Date : 05 APR 1971

Pagination or Media Count : 47

Abstract : The report discusses in detail computer programs that have been written to analyze the broadening of x-ray diffraction peaks of hexagonal close-packed metals. The programs allow for the correction of the overlap of the long tails of the diffraction peak, and then correct for polarization and geometric factors, atomic scattering factors, and the K alpha doublet. Fourier coefficients are calculated using Filon's method of evaluating trigonometric integrals. The Stokes' corrected Fourier coefficients are separated into particle size and distortion coefficients using the Warren-Averbach technique modified for hexagonal close-packed metals. Domain sizes are obtained from fault-unaffected peaks, whereas stacking fault probabilities are obtained from fault-affected peaks. (Author)

Descriptors :   (*METAL CRYSTALS, X RAY DIFFRACTION), (*COMPUTER PROGRAMMING, *X RAY DIFFRACTION), CRYSTAL LATTICES, POWDER METALS, INTENSITY, COMPUTER PROGRAMS, FOURIER ANALYSIS, SERIES(MATHEMATICS)

Subject Categories : Computer Programming and Software
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE