Identification of C—H resonances in the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>K</mi></math></span>-shell excitation spectra of gas-phase, chemisorbed, and polymeric hydrocarbons

J. Stöhr; D. A. Outka; K. Baberschke; D. Arvanitis; J. A. Horsley

doi:10.1103/PhysRevB.36.2976

Rapid Communication

Identification of C—H resonances in the $K$ -shell excitation spectra of gas-phase, chemisorbed, and polymeric hydrocarbons

J. Stöhr, D. A. Outka, K. Baberschke, D. Arvanitis, and J. A. Horsley

Phys. Rev. B 36, 2976(R) – Published 15 August 1987

Abstract

We demonstrate the existence and angular dependence of C—H resonances in the carbon $K$ -shell excitation spectra of hydrocarbons. Near-edge x-ray-absorption fine-structure spectra of oriented polyethylene chains exhibit pronounced resonances which are associated with C—C and C—H bonds as determined from their angular dependence and from $X α$ multiple-scattering calculations. The presence of C—H resonances is also found in $K$ -shell excitation spectra of free ethylene and ethylene chemisorbed on various metal surfaces.