Bones, DL orcid.org/0000-0003-1394-023X, Gerding, M, Höffner, J et al. (2 more authors) (2016) A study of the dissociative recombination of CaO + with electrons: Implications for Ca chemistry in the upper atmosphere. Geophysical Research Letters, 43 (24). 12,333-12,339. ISSN 0094-8276
Abstract
The dissociative recombination of CaO+ ions with electrons has been studied in a flowing afterglow reactor. CaO+ was generated by the pulsed laser ablation of a Ca target, followed by entrainment in an Ar+ ion/electron plasma. A kinetic model describing the gas-phase chemistry and diffusion to the reactor walls was fitted to the experimental data, yielding a rate coefficient of (3.0 ± 1.0) × 10¯⁷ cm³ molecule¯¹ s¯¹ at 295 K. This result has two atmospheric implications. First, the surprising observation that the Ca+/Fe+ ratio is ~8 times larger than Ca/Fe between 90 and 100 km in the atmosphere can now be explained quantitatively by the known ion-molecule chemistry of these two metals. Second, the rate of neutralization of Ca+ ions in a descending sporadic E layer is fast enough to explain the often explosive growth of sporadic neutral Ca layers.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2016, The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License [https://creativecommons.org/licenses/by-nc-nd/4.0/], which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Physical Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Feb 2017 16:54 |
Last Modified: | 05 Oct 2017 16:34 |
Published Version: | https://doi.org/10.1002/2016GL071755 |
Status: | Published |
Publisher: | American Geophysical Union |
Identification Number: | 10.1002/2016GL071755 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:111820 |