SF6- photodetachment near the adiabatic limit

I. Luzon; M. Nagler; O. Heber; D. Strasser

doi:10.1039/c4cp05068a

SF₆^- photodetachment near the adiabatic limit

I. Luzon, M. Nagler, O. Heber, D. Strasser^*

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

High sensitivity photodetachment cross-section measurements of SF₆^- are performed near the adiabatic threshold limit. The extraction of adiabatic detachment energy (ADE) from the high sensitivity measurement of the cross-section change as a function of photon energy is discussed. Below the vertical detachment energy a steep 4 orders of magnitude cross-section drop is observed, with cross sections as low as 2 × 10^-6 Å² measured for photon energies below 2 eV. The cross-section is fitted with both the expected spectral shape based on recently calculated Frank-Condon overlaps and a phenomenological threshold function. The resulting 1.7 ± 0.02 eV ADE values are significantly higher than previously recommended experimental ADE values obtained based on kinetics modeling, and possible differences between the experimental approaches are discussed.

Original language	English
Pages (from-to)	7670-7675
Number of pages	6
Journal	Physical Chemistry Chemical Physics
Volume	17
Issue number	12
DOIs	https://doi.org/10.1039/c4cp05068a
State	Published - 28 Mar 2015

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title = "SF6- photodetachment near the adiabatic limit",

abstract = "High sensitivity photodetachment cross-section measurements of SF6- are performed near the adiabatic threshold limit. The extraction of adiabatic detachment energy (ADE) from the high sensitivity measurement of the cross-section change as a function of photon energy is discussed. Below the vertical detachment energy a steep 4 orders of magnitude cross-section drop is observed, with cross sections as low as 2 × 10-6 {\AA}2 measured for photon energies below 2 eV. The cross-section is fitted with both the expected spectral shape based on recently calculated Frank-Condon overlaps and a phenomenological threshold function. The resulting 1.7 ± 0.02 eV ADE values are significantly higher than previously recommended experimental ADE values obtained based on kinetics modeling, and possible differences between the experimental approaches are discussed.",

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T1 - SF6- photodetachment near the adiabatic limit

AU - Luzon, I.

AU - Nagler, M.

AU - Heber, O.

AU - Strasser, D.

PY - 2015/3/28

Y1 - 2015/3/28

N2 - High sensitivity photodetachment cross-section measurements of SF6- are performed near the adiabatic threshold limit. The extraction of adiabatic detachment energy (ADE) from the high sensitivity measurement of the cross-section change as a function of photon energy is discussed. Below the vertical detachment energy a steep 4 orders of magnitude cross-section drop is observed, with cross sections as low as 2 × 10-6 Å2 measured for photon energies below 2 eV. The cross-section is fitted with both the expected spectral shape based on recently calculated Frank-Condon overlaps and a phenomenological threshold function. The resulting 1.7 ± 0.02 eV ADE values are significantly higher than previously recommended experimental ADE values obtained based on kinetics modeling, and possible differences between the experimental approaches are discussed.

AB - High sensitivity photodetachment cross-section measurements of SF6- are performed near the adiabatic threshold limit. The extraction of adiabatic detachment energy (ADE) from the high sensitivity measurement of the cross-section change as a function of photon energy is discussed. Below the vertical detachment energy a steep 4 orders of magnitude cross-section drop is observed, with cross sections as low as 2 × 10-6 Å2 measured for photon energies below 2 eV. The cross-section is fitted with both the expected spectral shape based on recently calculated Frank-Condon overlaps and a phenomenological threshold function. The resulting 1.7 ± 0.02 eV ADE values are significantly higher than previously recommended experimental ADE values obtained based on kinetics modeling, and possible differences between the experimental approaches are discussed.

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SF₆^- photodetachment near the adiabatic limit

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