Phonons from neutron powder diffraction

Details Phonons from neutron powder diffraction Phonons from neutron powder diffraction

1998-11-04

arxiv.org/abs/cond-mat/9811062v2

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.60.6204

The spherically averaged structure function $\soq$ obtained from pulsed neutron powder diffraction contains both elastic and inelastic scattering via an integral over energy. The Fourier transformation of $\soq$ to real space, as is done in the pair density function (PDF) analysis, regularizes the data, i.e. it accentuates the diffuse scattering. We present a technique which enables the extraction of off-center phonon information from powder diffraction experiments by comparing the experimental PDF with theoretical calculations based on standard interatomic potentials and the crystal symmetry. This procedure (dynamics from powder diffraction(DPD)) has been successfully implemented for two systems, a simple metal, fcc Ni, and an ionic crystal, CaF$_{2}$. Although computationally intensive, this data analysis allows for a phonon based modeling of the PDF, and additionally provides off-center phonon information from powder neutron diffraction.

Affiliated with

Also associated with

No associations

Rating

Phonons from neutron powder diffraction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Phonons from neutron powder diffraction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phonons from neutron powder diffraction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-575994