title: Tuning the continuum ground state energy of NO2- 2 by water molecules.
abstract: Electron scattering on NO-2, NO-2 x (H2O), and NO-2 x (H2O)(2) was performed in two storage rings. We confirm the presence of earlier reported NO2-2 dianion resonances and show that they remain when water is attached. Importantly, hydration tunes the energy: each water molecule lowers the ground state energy by 0.8 +/- 0.3 eV relative to the monoanion. NO2-2 is observed to decay by two-electron emission, possibly in combination with fragmentation. NO(2-)2 x (H2O) mainly decays into NO-2 + H2O + e(-).
authors.affiliation: Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark.
authors.forename: A
authors.initials: A
authors.lastname: Svendsen
authors.forename: H
authors.initials: H
authors.lastname: Bluhme
authors.forename: M O A
authors.initials: MO
authors.lastname: El Ghazaly
authors.forename: K
authors.initials: K
authors.lastname: Seiersen
authors.forename: S
authors.initials: S
authors.lastname: Brøndsted Nielsen
authors.forename: L H
authors.initials: LH
authors.lastname: Andersen