Novel Collective Autoionization Process Observed in Electron Spectra of He Clusters (Articolo in rivista)

Type
Label
  • Novel Collective Autoionization Process Observed in Electron Spectra of He Clusters (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevLett.112.073401 (literal)
Alternative label
  • Ovcharenko, Y.; Lyamayev, V.; Katzy, R.; Devetta, M.; LaForge, A.; O'Keeffe, P.; Plekan, O.; Finetti, P.; Di Fraia, M.; Mudrich, M.; Krikunova, M.; Piseri, P.; Coreno, M.; Brauer, N. B.; Mazza, T.; Stranges, S.; Grazioli, C.; Richter, R.; Prince, K. C.; Drabbels, M.; Callegari, C.; Stienkemeier, F.; Moeller, T. (2014)
    Novel Collective Autoionization Process Observed in Electron Spectra of He Clusters
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ovcharenko, Y.; Lyamayev, V.; Katzy, R.; Devetta, M.; LaForge, A.; O'Keeffe, P.; Plekan, O.; Finetti, P.; Di Fraia, M.; Mudrich, M.; Krikunova, M.; Piseri, P.; Coreno, M.; Brauer, N. B.; Mazza, T.; Stranges, S.; Grazioli, C.; Richter, R.; Prince, K. C.; Drabbels, M.; Callegari, C.; Stienkemeier, F.; Moeller, T. (literal)
Pagina inizio
  • 073401 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 112 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 5 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Technical University of Berlin; University of Freiburg; University of Milan; University of Milan; Consiglio Nazionale delle Ricerche (CNR); Elettra Sincrotrone Trieste; University of Trieste; Ecole Polytechnique Federale de Lausanne; European XFEL GmbH; Sapienza University Rome; IOM CNR TASC Lab; University of Trieste (literal)
Titolo
  • Novel Collective Autoionization Process Observed in Electron Spectra of He Clusters (literal)
Abstract
  • The ionization dynamics of He nanodroplets irradiated with intense femtosecond extreme ultraviolet pulses of up to 10(13) W/cm(2) power density have been investigated by photoelectron spectroscopy. Helium droplets were resonantly excited to atomiclike 2p states with a photon energy of 21.4 eV, below the ionization potential (I-p), and directly into the ionization continuum with 42.8 eV photons. While electron emission following direct ionization above I-p is well explained within a model based on a sequence of direct electron emission events, the resonant excitation provides evidence of a new, collective ionization mechanism involving many excited atomiclike 2p states. With increasing power density the direct photoline due to an interatomic Coulombic decay disappears. It indicates that ionization occurs due to energy exchange between at least three excited atoms proceeding on a femtosecond time scale. In agreement with recent theoretical work the novel ionization process is very efficient and it is expected to be important for many other systems. (literal)
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