2020/06/14 by Ltaief Ben Ltaief, Ltaief, Ltaief Ben, M. Shcherbinin +11
Physics and Astronomy · #Atomic and Molecular Clusters (physics.atm-clus) #Atomic and Subatomic Physics Research #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics
paper · pdf · doi:10.48550/arxiv.2006.08032
openalex publication_date 2020/06/14 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28
We present the first measurements of photoelectron spectra of atomic clusters\nembedded in superfluid helium (He) nanodroplets. Owing to the large absorption\ncross section of xenon (Xe) around 100 eV photon energy (4d inner-shell\nionization), direct dopant photoionization exceeds charge transfer ionization\nvia the ionized He droplets. Despite the predominant creation of Xe2+ and\nXe3+ by subsequent Auger decay of free Xe atoms, for Xe embedded in He\ndroplets only singly charged Xek+, k=1,2,3 fragments are observed. Broad Xe+\nion kinetic-energy distributions indicate Coulomb explosion of the ions due to\nelectron transfer to the primary Auger ions from surrounding neutral atoms. The\nelectron spectra correlated with Xe ions emitted from the He nanodroplets\ncontain a low-energy feature and nearly unshifted Xe photolines. These results\npave the way to extreme ultraviolet (XUV) and x-ray photoelectron spectroscopy\nof clusters and molecular complexes embedded in He nanodroplets.\n