Tuning the continuum ground state energy of NO2- 2 by water molecules

A Svendsen; H Bluhme; M O A El Ghazaly; K Seiersen; S Brøndsted Nielsen; L H Andersen

doi:10.1103/PhysRevLett.94.223401

Tuning the continuum ground state energy of NO2- 2 by water molecules

Phys Rev Lett. 2005 Jun 10;94(22):223401. doi: 10.1103/PhysRevLett.94.223401. Epub 2005 Jun 6.

Authors

A Svendsen¹, H Bluhme, M O A El Ghazaly, K Seiersen, S Brøndsted Nielsen, L H Andersen

Affiliation

¹ Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark.

PMID: 16090391
DOI: 10.1103/PhysRevLett.94.223401

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(-).