title: Resonant channel coupling in electron scattering by pyrazine.
abstract: Detailed investigation of the three low-energy resonances seen in electron scattering by the diazabenzene molecule pyrazine reveals that the first two are nearly pure single-channel shape resonances, but the third is, as long suspected, heavily mixed with core-excited resonances built on low-lying triplet states. Such resonant channel coupling is likely to be widespread in pi-ring molecules, including the nucleobases of DNA and RNA, where it may form a pathway for radiation damage.
authors.affiliation: A.A. Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: Carl
authors.initials: C
authors.lastname: Winstead
authors.forename: Vincent
authors.initials: V
authors.lastname: McKoy
mesh_terms: D004247:DNA / Q000737:chemistry; D004583:Electrons; D009705:Nucleosides / Q000737:chemistry; D011719:Pyrazines / Q000737:chemistry*; D012313:RNA / Q000737:chemistry; D012542:Scattering, Radiation
chemical_list: D009705:Nucleosides; D011719:Pyrazines; D012313:RNA; D004247:DNA