The Gas Phase Photoemission (GAPH) beamline is the only one at Elettra specifically devoted to research on gaseous systems.
GAPH offers a multi-technique approach for investigation of electronic properties of free atoms, molecules and clusters in the photon energy range 13-900 eV.

The broad energy range, the high resolving power and flux together with the purpose built end-stations, make this facility ideal for investigating the spectroscopy and dynamics of basic processes like inner-shell and multiple excitations and ionisation, as well as for characterising key processes relevant to several areas of science and technology (for example atmospheric chemistry, material science and biomedical sciences).

Gas Phase highlights | Publications

Vibrationally resolved high-resolution NEXAFS and XPS spectra of phenanthrene and coronene

 C1s Near-Edge X-rayAbsorption Fine-Structure (NEXAFS) spectroscopy and X-ray Photoelectron Spectroscopy in the gas phase of two polycyclic aromatic hydrocarbons (phenanthrene and coronene) have been measured and compared to vibrationally resolved theoretical spectra. G. Fronzoni et al JCP 141 (2014).

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"Position” does matter: The photofragmentation of the nitroimidazole isomers

Experimental and theoretical spectroscopic methods have been combined to disentangle the fundamental mechanism of VUV induced fragmentation of the three isomers of nitroimidazole. P. Bolognesi et al.  J. Chem. Phys., (2016)
 

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Enhanced Ionization of Embedded Clusters by Electron-Transfer-Mediated Decay in Helium Nanodroplets

 We report the observation of electron-transfer-mediated decay (ETMD) involving magnesium (Mg) clusters embedded in helium (He) nanodroplets.. A. C. LaForge et al.; PRL 116, 203001 (2016)

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Negative-Ion/Positive-Ion Coincidence Yields of Core-Excited Water

The analysis of negative-ion/positive-ion (NIPICO) and negative-ion/positive-ion/positive-ion coincidence (NIPIPICO) events provides new information on pathways leading to negative ion production in water.
C. Stråhlman et al.; J. Phys. Chem. (2016)

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Proposal Sumission

We invite users and collaborators to discuss their proposals with the beamline local contacts well in advance before the submission deadline. This is crucial for a careful assesment of the experiment feasibility and may lead to improvements in the proposed experimental plan. Our website provides a wealth of informaiton on experiment feasibilty and proposal submission. For more info, please vist the user info section.

Call for proposals