  Complete dissociation dynamics of low energy electron attachment to ammonia
molecule has been studied using velocity slice imaging (VSI) spectrometer. One
low energy resonant peak around 5.5 eV and a broad resonance around 10.5 eV
incident electron energy has been observed. The resonant states mainly
dissociate via H$^-$ and NH$_2^-$ fragments, though for the upper resonant
state, signature of NH$^-$ fragments are also predicted due to three body
dissociation process. Kinetic energy and angular distributions of the NH$_2^-$
fragment anions are measured simultaneously using VSI technique. Based on our
experimental observations, we find the signature of A$_1$ symmetry in the 10.5
eV resonance energy whereas, the 5.5 eV resonance is associated with the well
known A$_1$ symmetry.
