Momentum distribution in vanadium: compton scattering and positron annihilation

Abstract

Self-consistent, linear-combination-of-Gaussian-orbitals band-structure method is used within the independent particle model, to calculate the electron momentum distributions, ρ(p), and two-photon momentum distributions, ρ^2γ(p), in metallic vanadium. We present results for ρ(p), Compton profiles, ρ^2γ(p), one- and two-dimensional angular correlation of positron annihilation radiation, etc. Results are compared with other calculations and with experiments wherever available. In particular, the present results for ρ^2γ(p) are analyzed in terms of contributions from different sheets of Fermi surface of V, and are compared with ρ^2γ(p) reconstructed from experimental two-dimensional angular correlation of positron annihilation radiation data sets by Pecora et al.