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A fast high‐accuracy lattice‐parameter comparator
Author(s) -
Häusermann D.,
Hart M.
Publication year - 1990
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/s0021889889011623
Subject(s) - comparator , lattice (music) , silicon , lattice constant , radiation , materials science , crystal structure , computational physics , optics , physics , crystallography , optoelectronics , chemistry , diffraction , acoustics , quantum mechanics , voltage
A method of measuring differences in lattice spacing with an accuracy of 1 part in 10 8 in a period as short as two minutes is described. The method uses one source of copper radiation and a triple‐axis arrangement. Two of these axes are double‐leaf silicon springs in monolithic crystal assemblies which achieve the high stability required by such measurements. Samples are easily changed and sequences of measurements are performed entirely under computer control. The method is demonstrated by a comparison of the lattice spacings of four samples which reveals differences of up to 60 parts in 10 8 between silicon crystals of different origins.