Polarization dependent X-ray spectra of MgB 2

Abstract

The polarized dipole spectra of MgB 2 have been calculated and a strong anisotropy was found. Using the final state rule for calculating the K-absorption spectra of magnesium, it can be shown that the empty p-like states are shifted to lower energies compared to the ground state calculations. For the K-absorption spectrum of boron the effect is much weaker, since screening of the core hole is rather efficient in this case.