Study of the electronic structure of U/sub x/Th/sub 1-x/As and U/sub x/Th/sub 1-x/Sb by means of the fully relativistic Korringa-Kohn-Rostoker--averaged T-matrix approximation method

The differential density of states for the ternary systems U/sub x/Th/sub 1-x/As and U/sub x/Th/sub 1-x/Sb are calculated by means of the fully relativistic Korringa-Kohn-Rostoker--averaged T-matrix approximation method. It is found that the intensity of the U f-like impurity peak changes characteristically with respect to the molar fraction and that its energetic position determines the Fermi energy. Angular-momentum-dependent local density of states functions are used to discuss the implications of this particular peak to the nonmetal L emission spectra. The results obtained are directly related to photoemission or x-ray-emission experiments