Corroboration of theory for H + D2 --> D + HD (v' = 3, j' = 0) reactive scattering dynamics

The Journal of Physical Chemistry. a
Noah T GoldbergRichard N Zare

Abstract

The differential cross section (DCS) for the reaction H + D2 --> D + HD (v' = 3, j' = 0) exhibits particularly rich dynamics; in addition to the expected direct recoil backscattering feature, a surprising time-delayed forward scattering feature appears that has been attributed to glory scattering arising from nearside and farside interference. This fact leads to a complex DCS that depends strongly on the collision energy. Its accurate calculation requires a fully quantum mechanical (QM) treatment. We report improved measurements of this DCS over the collision energy range 1.55 < or = E(coll) < or = 1.82 eV. Previous measurements using the core extraction method, while generally in agreement with theory, lacked sufficient resolution to capture all of the noteworthy behavior of the system; in the present work, we use ion imaging to observe many previously unresolved features of the DCS, particularly in the forward-scattered region. Agreement with QM calculations is found at all collision energies, reconciling an earlier discrepancy between experiment and theory near E(coll) = 1.54 eV.

Citations

Nov 19, 2008·Proceedings of the National Academy of Sciences of the United States of America·Noah T GoldbergRichard N Zare
Sep 15, 2012·Annual Review of Physical Chemistry·Richard N Zare
Jul 24, 2015·Nature Chemistry·Pablo G JambrinaRichard N Zare
Dec 21, 2010·Physical Chemistry Chemical Physics : PCCP·Nate C-M BartlettStuart C Althorpe
Nov 17, 2009·The Journal of Physical Chemistry. a·Chengkui Xiahou, J N L Connor

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