Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 4, Pages 614-617Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.614
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We report ab initio calculations of the x-ray absorption cross section for the near edge x-ray absorption fine structure of C2H6, and C2H4, and C2H2 at the C K-edge, based on a full multiple scattering formalism. The angular dependence of the electric dipole transition in the calculations as well as the angular dependent experiments for the oriented molecules give a good opportunity to compare both. The resonance can be assigned to a sigma* shape resonance. The multiple scattering formalism and the experiment agree well and thereby support the existence of such features in the spectra.
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