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Photoemission spectroscopy is used to quantitatively determine the partial cross section of the 1t₂ and 2a₁ subshells of methane. Photoelectron spectra are recorded using a hemispherical electron analyzer and monochromatized synchrotron radiation. The corresponding emission peaks are analyzed to calculate the partial cross sections with the associated uncertainties in a photon energy range from 16.5 to 70 eV. The presented results cover this broad energy range with corresponding uncertainties and belong to the framework of photoemission orbital tomography, aiming to bridge the experimental gap between simple single atoms and complex molecular monolayers.
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Kirschner et al. (2024) studied this question.
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