Electron Momentum Density of Hexagonal Magnesium Studied by Compton Scattering |
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| Journal | Solid State Phenomena (Volume 112) |
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| Volume | Materials in Transition |
| Edited by | Ludwik Dobrzynski and Krystyna Perzynska |
| Pages | 123-132 |
| DOI | 10.4028/www.scientific.net/SSP.112.123 |
| Citation | Marek Brancewicz et al., 2006, Solid State Phenomena, 112, 123 |
| Online since | May, 2006 |
| Authors | Marek Brancewicz, Henryk Reniewicz, Andrzej Andrejczuk, Ludwik Dobrzyński, Eugeniusz Żukowski, Stanisław Kaprzyk |
| Keywords | Compton Scattering, Directional Electron Momentum Distribution, KKR Theory, Magnesium Crystal |
| Abstract | 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. |
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