A classroom demonstration of reciprocal space

Morten Hannibal Madsen, Louise Høpfner, Nina Rasmussen, Mikkel Stolborg, Jesper Nygård, Robert Krarup Feidenhans'l, Jan Westenkær Thomsen

3 Citations (Scopus)

Abstract

An array of nanowires a laser pointer are used for a simple visualization of two-dimensional reciprocal space. The experiment can be performed without any preparation in any classroom. It aids the teaching of scattering experiments, illustrates the underlying principles of electron, x-ray, neutron scattering. A detailed study of the diffraction pattern was performed by mounting the sample with nanowires on a stage designed for x-ray scattering. The setup is well suited for undergraduate students, who get training in sample alignment in a small lab instead of at a large-scale facility. The exact positions of the diffraction spots are calculated monitored experimentally for a 360o rotation of the sample. By fitting to this set of images, it is possible to determine the lattice vectors of the artificial crystal with an uncertainty of less than 1%.

Original languageEnglish
Article number274
JournalAmerican Journal of Physics
Volume81
Issue number4
ISSN0002-9505
DOIs
Publication statusPublished - 18 Mar 2013

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