Bazin, Marc; Ptasińska, Sylwia; Bass, Andrew D. and Sanche, Leon
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|DOI (Digital Object Identifier) Link:||http://dx.doi.org/doi:10.1039/b814219j|
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Low energy electron induced dissociation of condensed nitromethane was investigated by measuring the electron stimulated desorption of anions and cations from multilayer films of CH3NO2 and CD3NO2, using a recently constructed, high sensitivity time of flight mass spectrometer. The desorbed yields were measured as a function of incident electron energy in the range between 1 to 20 eV and as function of coverage on Pt and Xe substrates. In anion desorption experiments, the following ions were observed: H? (D?), O?, OH? (OD?), CN?, NCO?, NO2?, CHNO2? (CDNO2?), CH2NO2? (CD2NO2?). Resonant structure seen in all anion yield functions, is attributed to dissociative electron attachment (DEA), though certain anion signals [e.g., OH? (OD?) and CH2NO2? (CD2NO2?)] are likely the result of reactive scattering by O? ions. The dominant desorbed cation signals are CD3+ and NO+, and the appearance potentials of these species were measured to be 12.2 and 11.5 eV, respectively. The present measurements provide information on how the electron-induced dissociation processes of this proto-typical explosive molecule are modulated by the condensed environment and on how initial dissociation events occurring on a particular molecule, may induce further dissociation.
|Item Type:||Journal Article|
|Copyright Holders:||2009 the Owner Societies|
|Academic Unit/Department:||Science > Physical Sciences|
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||Tracy Bartlett|
|Date Deposited:||11 Nov 2010 11:36|
|Last Modified:||19 Dec 2012 09:48|
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