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Low energy electron impact resonances of anthracene probed by 2D photoelectron imaging of its radical anion.

Mensa-Bonsu, Golda and Lietard, Aude and Tozer, David J. and Verlet, Jan R. R. (2020) 'Low energy electron impact resonances of anthracene probed by 2D photoelectron imaging of its radical anion.', Journal of chemical physics., 152 (17). p. 174303.

Abstract

Electron-molecule resonances of anthracene were probed by 2D photoelectron imaging of the corresponding radical anion up to 3.7 eV in the continuum. A number of resonances were observed in both the photoelectron spectra and angular distributions, and most resonances showed clear autodetachment dynamics. The resonances were assigned using density functional theory calculations and are consistent with the available literature. Competition between direct and autodetachment, as well as signatures of internal conversion between resonances, was observed for some resonances. For the 12B2g resonance, a small fraction of population recovers the ground electronic state as evidenced by thermionic emission. Recovery of the ground electronic state offers a route of producing anions in an electron–molecule reaction; however, the energy at which this occurs suggests that anthracene anions cannot be formed in the interstellar medium by electron capture through this resonance.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1063/5.0007470
Publisher statement:© 2020 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Mensa-Bonsu, Golda, Lietard, Aude, Tozer, David J. & Verlet, Jan R. R. (2020). Low energy electron impact resonances of anthracene probed by 2D photoelectron imaging of its radical anion. The Journal of Chemical Physics 152(17): 174303 and may be found at https://doi.org/10.1063/5.0007470
Date accepted:12 April 2020
Date deposited:14 May 2020
Date of first online publication:04 May 2020
Date first made open access:14 May 2020

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