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dc.contributor.authorPlunkett, Alexander
dc.contributor.authorHarkema, Nathan
dc.contributor.authorLucchese, Robert R.
dc.contributor.authorMcCurdy, C. William
dc.contributor.authorSandhu, Arvinder
dc.date.accessioned2019-07-30T19:07:04Z
dc.date.available2019-07-30T19:07:04Z
dc.date.issued2019-06-06
dc.identifier.citationPlunkett, A., Harkema, N., Lucchese, R. R., McCurdy, C. W., & Sandhu, A. (2019). Ultrafast Rydberg-state dissociation in oxygen: Identifying the role of multielectron excitations. Physical Review A, 99(6), 063403.en_US
dc.identifier.issn2469-9926
dc.identifier.doi10.1103/physreva.99.063403
dc.identifier.urihttp://hdl.handle.net/10150/633575
dc.description.abstractWe investigated the fragmentation dynamics of highly excited states of molecular oxygen using femtosecond transient photoelectron spectroscopy. An extreme ultraviolet (XUV) pulse populates the autoionizing Rydberg series converging to O-2(+) c(4)Sigma(-)(u), and a femtosecond near-infrared (IR) pulse was used to photoionize these states as they dissociate. Monitoring the differential photoelectron spectra as a function of time delay allowed us to obtain the relaxation lifetimes of these Rydberg states. We observed a photoelectron signal corresponding to the formation of a 4p excited atomic oxygen fragment, which is not an expected dissociation product of the (O-2(+) c(4)Sigma(-)(u))nl sigma(g) Rydberg series. Analysis of the time-dependent photoelectron spectra and photoionization calculations indicate that this fragment results from a previously unexplored (O-2(+) (4)Pi(g))4p repulsive state and that, contrary to expectations, this multielectron excitation pathway presents a substantial cross section. Our study demonstrates that two-color time-resolved differential photoelectron spectroscopy is an excellent tool to study the fragmentation dynamics of such multielectron excited states, which are not easily probed by other means.en_US
dc.description.sponsorshipUS Army Research Laboratory; U.S. Army Research Office [W911NF-14-1-0383]; National Science Foundation (NSF) [PHY-1505556]; U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) [DE-SC0018251]; US Department of Energy Chemical Sciences, Geosciences, and Biosciences Division [DE-AC02-05CH11231]en_US
dc.language.isoenen_US
dc.publisherAMER PHYSICAL SOCen_US
dc.rights© 2019 American Physical Society.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.titleUltrafast Rydberg-state dissociation in oxygen: Identifying the role of multielectron excitationsen_US
dc.typeArticleen_US
dc.identifier.eissn2469-9934
dc.contributor.departmentUniv Arizona, Dept Physen_US
dc.identifier.journalPHYSICAL REVIEW Aen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.volume99
dc.source.issue6
refterms.dateFOA2019-07-30T19:07:04Z


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