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  • 07.85.+n  (1)
  • chemisorption  (1)
  • 1
    ISSN: 1432-0630
    Keywords: 07.85.+n ; 33.20.Rm ; 35.20.Pa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Using plane grating, ellipsoidal mirror, grazing incidence monochromators at the storage ring BESSY, a resolution of ≦ 150meV was achieved for a photon energy of 285 eV. This high energy resolution considerably extends the range of possible studies using core level Spectroscopy. Some of the new opportunities are illustrated at the CK edge by resolving the vibrational fine structure of condensed C2H4 multilayers in the (1s−1, π*) state by means of photoabsorption spectroscopy. For the sake of comparison with other high resolution instruments, the vibrational fine structure of condensed N2 multilayers at the NK edge (∼ 400eV) was also measured, yielding a resolving power of 3000.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Topics in catalysis 10 (2000), S. 199-207 
    ISSN: 1572-9028
    Keywords: chemisorption ; molecular dynamics ; SEXAFS ; NEXAFS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A useful and necessary step to understand the complexity of catalysis is to first study the simple prototype systems which involve elements active in such reactions. Studies throwing light on gas–metal interaction are of vital importance. The X-ray absorption spectroscopy can provide vital information for catalysis as one probes the system on a very local scale. We present state of the art surface EXAFS measurements of carbon, nitrogen and oxygen adsorbed on well characterised metal surfaces (Ni and Cu). The present contribution highlights from experimental measurements supported by improved theoretical calculations that temperature and angular dependent studies are essential for a reliable structural analysis and to gain an insight into absorbate–substrate bonding and kinetics. The low Z metal systems were found suitable to detect unambiguously the photoelectron backscattering by interstitial charge densities.
    Type of Medium: Electronic Resource
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