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 Title: PHOTOELECTRON VELOCITY MAP IMAGING SPECTROSCOPY OF BeS− Author(s): Theis, Mallory Contributor(s): Heaven, Michael; Mascaritolo, Kyle; Dermer, Amanda Reed Subject(s): Comparing theory and experiment Abstract: The BeS$^{-}$ anion to neutral ground state transition, $mathrm{X ^{2}Sigma^{+} rightarrow X ^{1}Sigma^{+}}$ has been studied using photoelectron velocity map imaging spectroscopy. Rotational constants, vibrational intervals and the electron binding energy of BeS$^{-}$ have been determined for the first time. Rotational constants were derived from band contour analyses, as the contours exhibited band head features associated with changes in the rotational angular momenta of $Delta$N=0, $pm$1, and $pm$2. A dipole bound state (DBS) of BeS$^{-}$ was observed 130 wn below the detachment threshold. Autodetachment spectra for the transition to the DBS were rotationally resolved, providing an accurate rotational constant for BeS$^{-}$, v=0. The experimental results were found to be in reasonable agreement with the predictions of high level ab initio calculations. Issue Date: 6/19/2017 Publisher: International Symposium on Molecular Spectroscopy Citation Info: APS Genre: CONFERENCE PAPER/PRESENTATION Type: Text Language: English URI: http://hdl.handle.net/2142/96999 DOI: 10.15278/isms.2017.MI11 Date Available in IDEALS: 2017-07-272018-01-29
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