title: Unusual temperature dependence of the dissociative electron attachment cross section of 2-thiouracil.
abstract: 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.affiliation: Faculty of Science, Siedlce University, 3 Maja 54, 08-110 Siedlce, Poland.
authors.forename: Janina
authors.initials: J
authors.lastname: Kopyra
authors.affiliation: Université de Lyon, F-69003 Lyon, France; Université Lyon 1, Villeurbanne, France; and CNRS/IN2P3, UMR5822, Institut de Physique Nucléaire de Lyon, Lyon, France.
authors.forename: Hassan
authors.initials: H
authors.lastname: Abdoul-Carime