Survey of Ar-tagged predissociation and vibrationally mediated photodetachment spectroscopies of the vinylidene anion, c2h 2-

Helen K. Gerardi, Kristin J. Breen, Timothy L. Guaseo, Gary H. Weddle, George H. Gardenier, Jennifer E. Laaser, Mark A. Johnson

Research output: Contribution to journalReview articlepeer-review

17 Scopus citations

Abstract

We report predissociation spectra of Ar-tagged C2H 2- and C2D2- anions, and explore vibrationally mediated photodetachment from various vibrational levels of the bare C2H2- ion using velocity-map imaging. Intense photodetachment resonances are observed in the C - H stretching region that are strongly correlated with vibrational hot bands in the anion photoelectron spectra, indicating that one-color, resonant two-photon photodetachment (R2PD) is complicated by excitation of vibrationally excited states with autodetaching upper levels embedded in the continuum. Isolation of the R2PD spectrum was achieved using a two-color, IR-IR scheme in which vibrational excitation and photodetachment were carried out in two separate laser interaction regions.

Original languageEnglish (US)
Pages (from-to)1592-1601
Number of pages10
JournalJournal of Physical Chemistry A
Volume114
Issue number3
DOIs
StatePublished - 2010

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