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Issue 17, 2019
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Dissociative electron attachment to HNO3 and its hydrates: energy-selective electron-induced chemistry

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Abstract

We probe the negative ion production upon the interaction of free electrons with gas-phase HNO3 and its mixed clusters with water. The electron-induced chemistry changes strongly with clustering, exhibiting significant electron energy dependence. For HNO3 hydrates, we identified three involved energy ranges with different behavior: low energies up to about 3.5 eV, an intermediate energy range around 6 eV, and a high energy range, approximately above 9 eV. The major difference is the degree to which the major gas-phase product, NO2, is converted to NO3. The latter is the dominant stratospheric anion. Its appearance due to the electron interaction with mixed HNO3/water ice particles thus strongly depends on the electron energy. We discuss the elementary processes and reaction pathways behind the anion conversion.

Graphical abstract: Dissociative electron attachment to HNO3 and its hydrates: energy-selective electron-induced chemistry

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Article information


Submitted
19 Feb 2019
Accepted
02 Apr 2019
First published
03 Apr 2019

Phys. Chem. Chem. Phys., 2019,21, 8691-8697
Article type
Paper

Dissociative electron attachment to HNO3 and its hydrates: energy-selective electron-induced chemistry

J. Lengyel, J. Fedor and M. Fárník, Phys. Chem. Chem. Phys., 2019, 21, 8691
DOI: 10.1039/C9CP00990F

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