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Issue		Eur. Phys. J. AP Volume 3, Number 2, August 1998
Page(s)		183 - 186
DOI		10.1051/epjap:1998219

DOI: 10.1051/epjap:1998219

Eur. Phys. J. AP 3, 183-186

Diffraction peak shift in MgO small crystallites

P. Gielen

Université Catholique de Louvain, avenue Comte de Namur, 13/3, 1300 Wavre, Belgium

Received: 20 November 1997 / Revised: 2 February and 10 April 1998 / Accepted: 21 April 1998

Abstract
A linear relationship is found between peak position and peak width for the X-ray diffraction peaks of MgO very small crystallites. The sign of the peak shift is explained. The peak shape is asymmetrical, the more asymmetrical the broader it is. The second Heisenberg's uncertainty relation is reinterpreted.

Résumé
L'auteur trouve une relation linéaire entre la position des pics et la largeur des pics de diffraction des rayons X pour de très petites cristallites de MgO. Il explique le signe du déplacement des pics. La forme des pics est asymétrique, d'autant plus asymétrique qu'ils sont plus larges. La seconde relation d'incertitude de Heisenberg est réinterprétée.

PACS
03.80.+r General theories of scattering - 32.30.-r Atomic spectra - 63.22.+m Phonons in low-dimensional structures and small particles

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