Fedor, Juraj May, Olivier Allan, Michael 2008-09-03 We have measured absolute dissociative electron attachment cross sections for H<i>X</i> and D<i>X</i> (<i>X</i>=Cl and Br) using a trochoidal electron spectrometer equipped with a total ion collection collision chamber, operated both in a field-free passive ion collection mode, and an active ion collection mode, with an extracting electric field. Our results for Br⁻ from HBr are in an excellent quantitative agreement with recent predictions of the nonlocal resonance model, but the cross sections for Cl⁻ from HCl and DCl are, respectively, 2.2 times and 2.8 times smaller than the theoretical predictions. Cross sections for the production of H⁻ and D⁻ in the 6–10  eV range are much smaller than those for <i>X</i>⁻ and the isotope effect is much weaker, consistent with the assignment to core-excited Feshbach resonances. There is one exception, however, the 9  eV band in HCl has a large isotope effect. application/pdf https://folia.unifr.ch/global/documents/300857 https://folia.unifr.ch/documents/300857/files/allan_acs.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.78.032701 info:eu-repo/semantics/openAccess License undefined Physical Review A. - 2008, vol. 78, p. 032701 Deuterium compounds Electron attachment Hydrogen compounds Isotope effects Molecule-electron collisions Negative ions Resonant states info:eu-repo/classification/udc/54 Absolute cross sections for dissociative electron attachment to HCl, HBr, and their deuterated analogs http://purl.org/coar/resource_type/c_6501