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Interest in the use of synchrotron radiation (SR) as a source of continuum in the extreme ultraviolet (EUV) spectral region was stimulated by the 1956 Physical Review article by Diran Tomboulian and Paul Hartman [1] of Cornell University. In their all-too-brief access to the Cornell 320 MeV electron synchrotron, they showed that SR should be an extremely useful intensity standard in the EUV. They also showed the continuum nature of SR by observing structure at the K-edge of Be at 112 eV.

Experimental data for x-ray absorption at the transition metal L 2, 3 edge for FeF2 and CoF2 are presented. They are compared with the results of calculations that include the intra-atomic effects due to the ion atomic multiplet and also of the ligand field splitting of the 3d orbitals. Good overall agreement between experiment and theory is found. We also show resonant x-ray emission data for these compounds obtained at selected excitation energies and compare them with the results of the ligand field atomic multiplet calculation. Very good agreement between the experimental and the calculated energy splittings is found. We also found good agreement for the relative intensities of the emission peaks. This indicates that, as in the case of manganese compounds, the low energy loss peaks are due to decay into d-excited states of the ground configuration. A comparison of the emission spectra of LaMnO3, MnF2, FeF2, and CoF2 obtained at excitation energies at the top of the corresponding L 2 absorption peak is...

The full spectrum of occupied and unoccupied σ and π orbitals is presented for solid C60, C70, and graphite, using Cls emission and absorption spectroscopy. There are significant diffcrences between C60 and C70, and even larger changes relative to their infinite analog graphite (C∝). A comparison is made with photocmission and inverse photoemission results, along with first principles quasiparticle calculations.