  Complete dissociation dynamics of low energy electron attachment to nitrogen
dioxide around 8.5 eV resonance has been studied using a velocity map imaging
(VMI) spectrometer. Besides the three prominent resonant peaks at around 1.4
eV, 3.1 eV, and 8.5 eV, we have found an additional small resonance at the
higher energy tail of the 8.5 eV resonance. We have collected the momentum
distribution data of O$^-$ ions at different incident electron energies around
the 8.5 eV resonance along with the smaller additional resonant peak. A
theoretical analysis of these resonances with the momentum imaging experimental
data on dissociative electron attachment to nitrogen dioxide in the gas phase
is used to provide a detailed picture of the molecular dissociation process.
