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

doi:10.1021/jp9095419

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

Chemistry (Twin Cities)

Research output: Contribution to journal › Review article › peer-review

19 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 language	English (US)
Pages (from-to)	1592-1601
Number of pages	10
Journal	Journal of Physical Chemistry A
Volume	114
Issue number	3
DOIs	https://doi.org/10.1021/jp9095419
State	Published - 2010

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10.1021/jp9095419

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

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.",

author = "Gerardi, {Helen K.} and Breen, {Kristin J.} and Guaseo, {Timothy L.} and Weddle, {Gary H.} and Gardenier, {George H.} and Laaser, {Jennifer E.} and Johnson, {Mark A.}",

year = "2010",

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pages = "1592--1601",

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T1 - Survey of Ar-tagged predissociation and vibrationally mediated photodetachment spectroscopies of the vinylidene anion, c2h 2-

AU - Gerardi, Helen K.

AU - Breen, Kristin J.

AU - Guaseo, Timothy L.

AU - Weddle, Gary H.

AU - Gardenier, George H.

AU - Laaser, Jennifer E.

AU - Johnson, Mark A.

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

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JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

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

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