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Dissociative electron attachment to acetaldehyde, CH3CHO. A laboratory study using the velocity map imaging technique

Szymańska-Skolimowska, Ewelina; Prabhudesai, Vaibhav S.; Mason, Nigel J. and Krishnakumar, E. (2013). Dissociative electron attachment to acetaldehyde, CH3CHO. A laboratory study using the velocity map imaging technique. Physical Chemistry Chemical Physics, 15(3) pp. 998–1005.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1039/C2CP42966G
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Abstract

A detailed experimental investigation of the dissociative electron attachment (DEA) process to acetaldehyde, CH3CHO is presented. To investigate this process we use a time of flight spectrometer coupled with the velocity slice imaging technique. DEA in CH3CHO is found to lead to the formation of CH3, O, OH, C2H, C2HO and CH3CO anionic products produced through scattering resonances in the electron energy range of 6 to 13 eV. Of these product ions only O is formed with any measurable kinetic energy distribution indicating a two-body dissociation process. CH3CO, although formed with very low kinetic energy, shows anisotropy in the velocity slice image, indicating ejection of the H atom in the 180° direction with respect to the electron beam. The low kinetic energy distributions and absence of any anisotropy in the angular distributions of the other product ions indicate that they are formed through multiple fragmentation of the transient molecular negative ion. The angular distribution of O is analysed in terms of the various partial waves.

Item Type: Journal Item
Copyright Holders: 2013 the Owner Societies
ISSN: 1463-9084
Project Funding Details:
Funded Project NameProject IDFunding Body
LASSIE project (7th Framework ProgrammeGrant Agreement no. 238258European Commissions
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Physics
Item ID: 40356
Depositing User: Ewelina Szymanska-Skolimowska
Date Deposited: 10 Jun 2014 15:51
Last Modified: 09 Dec 2018 16:29
URI: http://oro.open.ac.uk/id/eprint/40356
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