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Dissociative photoionization of the NO molecule studied by photoelectron-photon coincidence technique

AuthorsKivimäki, A.; Alvarez-Ruiz, J. ; Coreno, M.; Simone, M. de; Moise, A.; Partanen, L.; Richter, R.; Stankiewicz, M.
KeywordsDissociative photoionization
Vacuum ultraviolet emission
Inner valence
Photoelectron–photon coincidence
Nitric oxide
Issue Date2010
CitationJournal of Electron Spectroscopy and Related Phenomena 182(1): 63-69 (2010)
AbstractLow-energy photoelectron-vacuum ultraviolet (VUV) photon coincidences have been measured using synchrotron radiation excitation in the inner-valence region of the nitric oxide molecule. The capabilities of the coincidence set-up were demonstrated by detecting the 2s-1 → 2p-1 radiative transitions in coincidence with the 2s photoelectron emission in Ne. In NO, the observed coincidence events are attributed to dissociative photoionization with excitation, whereby photoelectron emission is followed by fragmentation of excited NO+ ions into O+ + N* or N+ + O* and VUV emission from an excited neutral fragment. The highest coincidence rate occurs with the opening of ionization channels which are due to correlation satellites of the 3σ photoionization. The decay time of VUV photon emission was also measured, implying that specific excited states of N atoms contribute significantly to observed VUV emission. © 2010 Elsevier B.V.
Identifiersdoi: 10.1016/j.elspec.2010.07.003
issn: 0368-2048
e-issn: 1873-2526
Appears in Collections:(IQFR) Artículos
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