PROBE COHERENCE VOLUME AND THE INTERPRETATION OF SCATTERING EXPERIMENTS

Citation
N. Bernhoeft et al., PROBE COHERENCE VOLUME AND THE INTERPRETATION OF SCATTERING EXPERIMENTS, Physical review letters, 81(16), 1998, pp. 3419-3422
Citations number
19
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
81
Issue
16
Year of publication
1998
Pages
3419 - 3422
Database
ISI
SICI code
0031-9007(1998)81:16<3419:PCVATI>2.0.ZU;2-L
Abstract
We discuss the importance of the probe coherence volume in the interpr etation of diffraction experiments. The availability of highly monochr omatic radiation, neutron or x-ray, calls into question the analysis o f data by deconvolution at the level of intensities. When the probe co herence volume approaches that of microscopically ordered regions in t he sample, new effects may be anticipated. For instance, under strong absorption the intensity dependence on the incident energy can be used to locate the source of the scattering below the sample surface. Two examples, based on experiments at an x-ray synchrotron source are disc ussed. [S0031-9007(98)07438-9].