Direct inner-shell photoionization of Xe atoms embedded in helium nanodroplets
| Autor: | Thomas Pfeifer, S. Mandal, M. Shcherbinin, Sivarama Krishnan, Robert Richter, Marcel Mudrich, L. Ben Ltaief |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Coulomb explosion
FOS: Physical sciences chemistry.chemical_element Synchrotron radiation Photoionization doped He nanodroplets 01 natural sciences 0103 physical sciences Physics::Atomic and Molecular Clusters Physics - Atomic and Molecular Clusters Inner shell Physics::Atomic Physics 010306 general physics Helium Physics inner-shell photoionization 010304 chemical physics electron-ion coincidence spectroscopy synchrotron radiation charge transfer Condensed Matter Physics Atomic and Molecular Physics and Optics 3. Good health chemistry Auger decay Atomic physics Atomic and Molecular Clusters (physics.atm-clus) |
| Zdroj: | Ben Ltaief, L, Shcherbinin, M, Mandal, S, R Krishnan, S, Richter, R, Pfeifer, T & Mudrich, M 2020, ' Direct inner-shell photoionization of Xe atoms embedded in helium nanodroplets ', Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 53, no. 20, 204001 . https://doi.org/10.1088/1361-6455/abaafb |
| Popis: | We present the first measurements of photoelectron spectra of atomic clusters embedded in superfluid helium (He) nanodroplets. Owing to the large absorption cross section of xenon (Xe) around 100 eV photon energy (4d inner-shell ionization), direct dopant photoionization exceeds charge transfer ionization via the ionized He droplets. Despite the predominant creation of Xe^2+ and Xe^3+ by subsequent Auger decay of free Xe atoms, for Xe embedded in He droplets only singly charged Xe_k^+, k=1,2,3 fragments are observed. Broad Xe^+ ion kinetic-energy distributions indicate Coulomb explosion of the ions due to electron transfer to the primary Auger ions from surrounding neutral atoms. The electron spectra correlated with Xe ions emitted from the He nanodroplets contain a low-energy feature and nearly unshifted Xe photolines. These results pave the way to extreme ultraviolet (XUV) and x-ray photoelectron spectroscopy of clusters and molecular complexes embedded in He nanodroplets. |
| Databáze: | OpenAIRE |
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