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The phenomena of magnetic circular and linear dichroism in the angular distribution ͑MCDAD and MLDAD͒ of photoelectrons manifest themselves in different photoelectron intensities in the related parts of their spectra when the sample is remanently magnetized in opposite directions. In combination with the experimental results carried out at the storage ring BESSY in Berlin, new fully relativistic photoemission calculations have been performed under the consideration of fully circularly and linearly polarized radiation in the soft-x-ray region. Here, we present the energetic dependence and the relationship between MCDAD and MLDAD in the energy range from hϭ90 to 175 eV. The physical origin of both phenomena is analyzed in detail with respect to the hybridization of the Fe 3p multiplet and the dynamics in this process is discussed.

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Molecular nitrogen is well known for its chemical inactivity. Experimental results for grazing incidence N 2 scattering from Pd͑111͒ surfaces in the keV range also reveal negligible influences of electronical processes on molecular fragmentation. Therefore, we carry out an appropriate classical treatment of this system. The N 2-Pd͑111͒ interaction is mediated by an analytical six-dimensional potential energy surface, based on ab initio density-functional-theory calculations and empirical data. The molecule-surface interaction seems to be strongly influenced by the azimuthal direction of incidence as well as the molecular axis orientation. Particularly, the fragmentation is found to be mainly due to vibrational excitation for highly indexed azimuthal directions, whereas for incidence along lowly indexed directions rotational excitation is more important.

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