Bond-length-dependent core hole localization observed in simple hydrocarbons

• Soft x-ray-emission spectroscopy is applied to measure the amount of dynamic symmetry breaking in core-excited acetylene, ethylene, and ethane. Large variations are observed between the molecules and are rationalized in terms of the different C-C bond lengths: Shorter bond lengths give smaller symmetry breaking. The results also indicate that asymmetric modes are important for all the systems studied, in contradiction to previous assumptions in literature.

Nyckelord

X-RAY-EMISSION

K-SHELL EXCITATION

PHOTOELECTRON-SPECTRA

SYMMETRY-BREAKING

HIGH-RESOLUTION

VIBRATIONAL STRUCTURE

SPECTROSCOPY

SCATTERING

IONIZATION

ETHENE

NATURAL SCIENCES

NATURVETENSKAP

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