Publications by authors named "Patrick Ascher"
The differentially pumped rare-gas filter at the end of the VUV beamline of the Swiss Light Source has been adapted to house a windowless absorption cell for gases. Absorption spectra can be recorded from 7 eV to up to 21 eV photon energies routinely, as shown by a new water and nitrous oxide absorption spectrum. By and large, the spectra agree with previously published ones both in terms of resonance energies and absorption cross sections, but that of NO exhibits a small shift in the {\tilde{\bf D}} band and tentative fine structures that have not yet been fully described.
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- An innovative high vacuum interface called liq-PEPICO is introduced for studying the liquid phase through photoelectron photoion coincidence spectroscopy at the Swiss Light Source.
- The setup includes a vaporizer that creates aerosols, forming a molecular beam that is then analyzed using ion velocity map imaging and various vaporization parameters to enhance sensitivity.
- The study successfully records mass spectra and threshold photoelectron spectra for specific compounds, showing accurate reproductions and allowing for the investigation of reactions like aldol condensation in real-time.