A high-resolution Compton scattering study of hexagonal zinc

Abstract

The directional Compton profiles (CP) of hcp single crystal of zinc have been measured along the [00·1], [11·0] and [11·1] directions using high energy synchrotron radiation and high-resolution Compton scanning spectrometer at ESRF (Beamline ID15B). The experimental data were compared with corresponding theoretical Korringa–Kohn–Rostoker (KKR) semi-relativistic calculations and previous low-resolution Compton measurements with the use of high-energy γ radiation from Cs isotope. Both the experimental and theoretical directional anisotropies of Compton profiles, shows very small anisotropy of the electron momentum density in hexagonal zinc, at most half of that presented in the literature for cubic systems. No sharp fermiology-related features of momentum density in Zn predicted by theory, especially in the momenta region below 1 a.u., are observed.