Fermi surface of Mg and Cd
  We present three-dimensional (3D) electron-positron momentum densities in Mg and Cd, reconstructed from 2D angular correlation of annihilation radiation data. By folding densities from the extended momentum space into the first Brillouin zone, we separated Fermi surfaces in various bands. Our results are in good agreement with band structure LMTO calculations.   In order to examine how many 1D profiles give us a possibility to reproduce the same details of the Fermi surfaces and Umklapp components of electron densities, various sets of 1D spectra were created for special directions in the Brillouin zone. Finally, corresponding 3D densities were reconstructed to show how many details one can get depending on the number of 1D profiles. 
A. Jura, G. Kontrym-Sznajd, M. Samsel-Czekala