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Background‐filtered transmission diffraction with internal intensity calibration
Author(s) -
Hiismäki P.
Publication year - 1989
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889888010015
Subject(s) - chopper , optics , intensity (physics) , diffraction , calibration , transmission (telecommunications) , isotropy , materials science , computational physics , fourier transform , physics , computer science , telecommunications , quantum mechanics , voltage
It is inferred that by frequency filtering the logarithm of the time‐of‐flight spectrum of neutrons that have passed through a powdered isotropic crystalline sample a diffractogram may be obtained with many desirable properties for achieving high‐quality refinement of structural parameters. Apart from multiple scattering no wavelength‐dependent effects or corrections need to be introduced, which implies automatic internal calibration of the Bragg intensities. For utilization of the inherent high resolution of the transmission geometry, a Fourier chopper in the pulsed beam from an intensity‐optimized quasi‐steady‐state moderator is suggested. Results of model calculations are presented.