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Title: Unusual temperature dependence of the dissociative electron attachment cross section of 2-thiouracil

At low energies (<3 eV), molecular dissociation is controlled by dissociative electron attachment for which the initial step, i.e., the formation of the transient negative ion, can be initiated by shape resonance or vibrational Feshbach resonance (VFR) mediated by the formation of a dipole bound anion. The temperature dependence for shape-resonances is well established; however, no experimental information is available yet on the second mechanism. Here, we show that the dissociation cross section for VFRs mediated by the formation of a dipole bound anion decreases as a function of a temperature. The change remains, however, relatively small in the temperature range of 370-440 K but it might be more pronounced at the extended temperature range.
Authors:
 [1] ;  [2] ;  [3] ;  [3]
  1. Faculty of Science, Siedlce University, 3 Maja 54, 08-110 Siedlce (Poland)
  2. Université de Lyon, F-69003 Lyon (France)
  3. (France)
Publication Date:
OSTI Identifier:
22493667
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 144; Journal Issue: 3; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ANIONS; CROSS SECTIONS; DIPOLES; DISSOCIATION; ELECTRON ATTACHMENT; EV RANGE; RESONANCE; TEMPERATURE DEPENDENCE; THIOURACIL; TRANSIENTS