Vibrational Feshbach resonances in dissociative electron attachment to uracil

Gallup, Gordon A. and Fabrikant, Ilya I. (2011). Vibrational Feshbach resonances in dissociative electron attachment to uracil. Physical Review A, 83(1) 012706.

DOI: https://doi.org/10.1103/PhysRevA.83.012706

Abstract

Low-energy dissociative electron attachment to uracil molecules in the gas phase is partly controlled by interaction between the lowest σ* resonance with a dipole-supported anion state. We calculate this contribution using a combination of the finite element discrete model with the resonance R-matrix theory. Deuterated uracil is investigated, also, and a strong isotope effect is found. The results agree qualitatively and semiquantitatively with experimental data, but for a complete description of the process the interaction between a second N—H bond σ* resonance in the molecule and the second π* resonance should be included.

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