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) Å(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.
authors.affiliation: Institute of Chemistry, The Hebrew university of Jerusalem, Jerusalem, 91904, Israel. strasser@huji.ac.il.
authors.forename: I
authors.initials: I
authors.lastname: Luzon
authors.forename: M
authors.initials: M
authors.lastname: Nagler
authors.forename: O
authors.initials: O
authors.lastname: Heber
authors.forename: D
authors.initials: D
authors.lastname: Strasser