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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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Publication details

The article was received on 19 Feb 2019, accepted on 02 Apr 2019 and first published on 03 Apr 2019


Article type: Paper
DOI: 10.1039/C9CP00990F
Citation: Phys. Chem. Chem. Phys., 2019, Advance Article

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    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, Advance Article , DOI: 10.1039/C9CP00990F

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