Density of states and isomer shift on the rare-earth metal europium

Abstract

The authors have calculated the energy band structure of BCC europium self-consistently by using the KKR method. The density of states curve has been computed by using Jepsen and Andersen's (1971) tetrahedron method. It has been confirmed that the Fermi energy E_F lies near the dip of the density of states curve, from which the electronic specific heat coefficient gamma and the paramagnetic susceptibility chi are obtained, and their temperature variations are examined. Also they have made a quantitative calculation of the electronic density at the nucleus, and obtained the contribution of the conduction electrons to the isomer shift of the ¹⁵¹Eu nucleus: 2 Sigma mod Phi _k(0) mod ²=0.44*10²⁶ cm^-3 atom^-1.