Intensity perturbations in the v(+)=2, 1 and 0 bands of the zero-kinetic-energy (ZEKE) photoelectron-spectrum of N2

S.H.S. Wilson, RJ Rednall, HH Fielding, F Merkt, Timothy Softley

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    8 Citations (Scopus)

    Abstract

    The observation of the ν+ = 2 band in the first electronic system of the one-photon zero-kinetic-energy (ZEKE) photoelectron spectrum of N2 is reported for the first time. The band was recorded using a coherent extreme ultraviolet source, tunable around 130 000 cm−1; the use of a new two-photon resonance at 98 855.87 cm−1 for sum-frequency mixing in krypton is discussed. The new ZEKE photoelectron band shows marked intensity perturbations, similar to the ν+ = 1 band previously reported, and these are attributed to a final-state interaction with a Rydberg state belonging to the A 2Πu series. A calculation to model the interactions in both the ν+ = 1 and ν+ = 2 bands is presented. A new calculation of rotational autoionization rates is also described for Rydberg levels converging to the ν+ = 0 limit; these rates determine the observed intensity perturbations in the O and M branches of the ν+ = 0 band of the ZEKE spectrum.
    Original languageEnglish
    Pages (from-to)151-166
    Number of pages16
    JournalJournal of Electron Spectroscopy and Related Phenomena
    Volume66
    DOIs
    Publication statusPublished - 1 Dec 1993

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