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Rosetta mission: Electron scattering cross sections-data needs and coverage in BEAMDB database

Marinković, Bratislav P., Bredehöft, Jan Hendrik, Vujčić, Veljko, Jevremović, Darko, Mason, Nigel J. (2017) Rosetta mission: Electron scattering cross sections-data needs and coverage in BEAMDB database. Atoms, 5 (4). Article Number 46. ISSN 2218-2004. (doi:10.3390/atoms5040046) (KAR id:74640)

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The emission of [O I] lines in the coma of Comet 67P/Churyumov-Gerasimenko during the Rosetta mission have been explained by electron impact dissociation of water rather than the process of photodissociation. This is the direct evidence for the role of electron induced processing has been seen on such a body. Analysis of other emission features is handicapped by a lack of detailed knowledge of electron impact cross sections which highlights the need for a broad range of electron scattering data from the molecular systems detected on the comet. In this paper, we present an overview of the needs for electron scattering data relevant for the understanding of observations in coma, the tenuous atmosphere and on the surface of 67P/Churyumov-Gerasimenko during the Rosetta mission. The relevant observations for elucidating the role of electrons come from optical spectra, particle analysis using the ion and electron sensors and mass spectrometry measurements. To model these processes electron impact data should be collated and reviewed in an electron scattering database and an example is given in the BEAMD, which is a part of a larger consortium of Virtual Atomic and Molecular Data Centre-VAMDC.

Item Type: Article
DOI/Identification number: 10.3390/atoms5040046
Uncontrolled keywords: Atomic and molecular databases, Cross sections, Electron scattering, Rosetta mission
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Nigel Mason
Date Deposited: 28 Jun 2019 14:04 UTC
Last Modified: 14 Sep 2020 10:12 UTC
Resource URI: (The current URI for this page, for reference purposes)
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