期刊
JOURNAL OF CHEMICAL PHYSICS
卷 138, 期 23, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4810870
关键词
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资金
- Italian PRIN project
- U.S. Department of Energy Basic Energy Sciences [DE-FG03-97ER45623]
Carbon 1s photoelectron spectra for 2-butyne (CH3C CCH3) measured in the photon energy range from threshold to 150 eV above threshold show oscillations in the intensity ratio C2,3/C1,4. Similar oscillations have been seen in chloroethanes, where the effect has been attributed to EXAFS-type scattering from the substituent chlorine atoms. In 2-butyne, however, there is no high-Z atom to provide a scattering center and, hence, oscillations of the magnitude observed are surprising. The results have been analyzed in terms of two different theoretical models: a density-functional model with B-spline atom-centered functions to represent the continuum electrons and a multiple-scattering model using muffin-tin potentials to represent the scattering centers. Both methods give a reasonable description of the energy dependence of the intensity ratios. (C) 2013 AIP Publishing LLC.
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