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dc.contributor.authorCattaneo, Laura
dc.contributor.authorPedrelli, Luca
dc.contributor.authorBello Romero, Roger Yulier 
dc.contributor.authorPalacios Cañas, Alicia 
dc.contributor.authorKeathley, Phillip D.
dc.contributor.authorMartín García, Fernando 
dc.contributor.authorKeller, Ursula
dc.contributor.otherUAM. Departamento de Químicaes_ES
dc.date.accessioned2023-02-09T11:58:17Z
dc.date.available2023-02-09T11:58:17Z
dc.date.issued2022-02-10
dc.identifier.citationPhysical Review Letters 128.6 (2022): 063001es_ES
dc.identifier.issn0031-9007 (print)es_ES
dc.identifier.issn1079-7114 (online)es_ES
dc.identifier.urihttp://hdl.handle.net/10486/706255
dc.description.abstractCapturing electronic dynamics in real time has been the ultimate goal of attosecond science since its beginning. While for atomic targets the existing measurement techniques have been thoroughly validated, in molecules there are open questions due to the inevitable copresence of moving nuclei, which are not always mere spectators of the phototriggered electron dynamics. Previous work has shown that not only can nuclear motion affect the way electrons move in a molecule, but it can also lead to contradictory interpretations depending on the chosen experimental approach. In this Letter we investigate how nuclear motion affects and eventually distorts the electronic dynamics measured by using two of the most popular attosecond techniques, reconstruction of attosecond beating by interference of two-photon transitions and attosecond streaking. Both methods are employed, in combination with ab initio theoretical calculations, to retrieve photoionization delays in the dissociative ionization of H2, H2 → H+ + H + E -, in the region of the Q1 series of autoionizing states, where nuclear motion plays a prominent role. We find that the experimental reconstruction of attosecond beating by interference of two-photon transitions results are very sensitive to bond softening around the Q1 threshold (27.8 eV), even at relatively low infrared (IR) intensity (I0 ∼ 1.4 × 1011 W/cm2), due to the long duration of the probe pulse that is inherent to this technique. Streaking, on the other hand, seems to be a better choice to isolate attosecond electron dynamics, since shorter pulses can be used, thus reducing the role of bond softening. This conclusion is supported by very good agreement between our streaking measurements and the results of accurate theoretical calculations. Additionally, the streaking technique offers the necessary energy resolution to accurately retrieve the fast-oscillating phase of the photoionization matrix elements, an essential requirement for extending this technique to even more complicated molecular targetses_ES
dc.format.extent6 pag.es_ES
dc.format.mimetypeapplication/pdfes_ES
dc.language.isoenges_ES
dc.publisherAmerican Physical Societyes_ES
dc.relation.ispartofPhysical Review Letterses_ES
dc.rights© 2022 authorses_ES
dc.subject.otherAtomic Targetses_ES
dc.subject.otherAttosecond Sciencees_ES
dc.subject.otherAttosecondses_ES
dc.subject.otherBond Softeninges_ES
dc.subject.otherElectron Dynamicses_ES
dc.subject.otherTwo-Photon Transitionses_ES
dc.titleIsolating attosecond electron dynamics in molecules where nuclei move fastes_ES
dc.typearticlees_ES
dc.subject.ecienciaQuímicaes_ES
dc.relation.publisherversionhttps://doi.org/10.1103/PhysRevLett.128.063001es_ES
dc.identifier.doi10.1103/PhysRevLett.128.063001es_ES
dc.identifier.publicationfirstpage063001-1es_ES
dc.identifier.publicationissue6es_ES
dc.identifier.publicationlastpage063001-6es_ES
dc.identifier.publicationvolume128es_ES
dc.relation.projectIDGobierno de España. PID2019-105458RB-I00es_ES
dc.relation.projectIDGobierno de España. SEV-2016-0686es_ES
dc.relation.projectIDGobierno de España. CEX2018-000805-Mes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.rights.ccReconocimientoes_ES
dc.rights.accessRightsopenAccesses_ES
dc.facultadUAMFacultad de Cienciases_ES
dc.institutoUAMInstituto de Investigación Avanzada en Ciencias Químicas (IAdChem)es_ES


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