Core-valence interactions in the linear dichroism of Cr $2p$ photoelectron spectra

The linear dichroism in the $2p$ photoelectron spectra of free Cr atoms and Cr atoms bound to an Fe surface has been determined. The spectra of free laser-oriented atoms are compared to Hartree-Fock calculations and the corresponding spectra of magnetized surface layers. The importance of satellites and of the $2p-3d$ Coulomb interaction in the final ionic state is demonstrated in both cases.