Abstract
The angular correlation of radiation from positrons annihilating in β′ CuZn single crystals has been measured. The crystals were oriented in the (100), (110) and (111) directions and the measurements yield information intimately related to the areas of slices through the Fermi surface normal to these directions. These cross sections were obtained from a theoretical calculation by Taylor using results of de Haas-van Alphen measurements for β′ CuZn. The experimental data are directly compared with these calculated values. We find a remarkable good agreement between theory and experiment and most of the anisotropy in the electron momentum distribution can be ascribed to the topology of the Fermi surface.
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