Electron Momentum Density of Hexagonal Magnesium Studied by Compton Scattering

Abstract:

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Directional Compton profiles of single crystal of hcp magnesium have been measured with scattering vectors along the [10 10], [1120] and [0001] directions in reciprocal space (special directions ΓΜ, ΓΚ, ΓΑ) using high-energy (662 keV) gamma radiation from a 137Cs isotope source. The experimental data were compared with corresponding theoretical Korringa-Kohn-Rostoker (KKR) calculations. The directional difference profiles, both experimental (of medium resolution) and theoretical ones, show very small anisotropy of the electron momentum density in magnesium, 2-3 times lower than in zinc and cadmium single crystals, significantly lower than observed in cubic metals. This small directional effect is in good agreement with Compton 60-keV energy experiments and positron annihilation data presented by other authors.

Info:

Periodical:

Solid State Phenomena (Volume 112)

Edited by:

Ludwik Dobrzynski and Krystyna Perzynska

Pages:

123-132

DOI:

10.4028/www.scientific.net/SSP.112.123

Citation:

M. Brancewicz et al., "Electron Momentum Density of Hexagonal Magnesium Studied by Compton Scattering ", Solid State Phenomena, Vol. 112, pp. 123-132, 2006

Online since:

May 2006

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$35.00

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