X-ray and Neutron Scattering from Surfaces and Thin Films
Proceedings of the International Conference on Surface and Thin Film studies using Glancing-Incidence X-ray and Neutron Scattering

J. Phys. Colloques 50 (1989) C7-189-C7-197
DOI: 10.1051/jphyscol:1989719

GRAZING-ANGLE NEUTRON DIFFRACTION

J.F. ANKNER¹, H. ZABEL², D.A. NEUMANN³, C.F. MAJKRZAK³, J.A. DURA⁴ et C.P. FLYNN<sup>4

1</sup>  Institute for Materials Science and Engineering, National Institute of Standards and Technology, A106 Reactor Building, Gaithersburg, MD 20899, USA
²  Institut für Experimental Physik IV, Ruhr Universität Bochum, Universitätsstr. 150, D 4630 Bochum 1 FRG
³  Institute for Materials Science and Engineering, National Institute of Standards and Technology, A106 Reactor Building, Gaithersburg, MD 20899, U.S.A.
⁴  Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1110 W. Green St., Urbana, IL 61801, U.S.A.

Résumé
Nous décrivons les principes de la diffraction en incidence rasante en y apportant notre propre contribution. En s'affranchissant des collimations non nécessaires, nous pouvons augmenter l'intensité limitée utilisable provenant des sources conventionnelles de neutrons, tout en préservant la sensibilité en profondeur de la méthode de diffusion en incidence rasante. Nous avons étudié un film de 3200 Å de Cr, déposé par épitaxie en jet moléculaire. Nous présentons et discutons les résultats obtenus.

Abstract
We describe the principles of grazing-angle neutron diffraction and our implementation of it. By relaxing non-essential collimations, we can make optimal use of the limited intensity available from conventional neutron sources, yet still preserve the depth-sensitivity of the grazing-angle method. We have studied a 3200 Å Cr film, grown by molecular beam epitaxy and discuss the results of this measurement in the context of current experimental conditions and future improvements.