Neutral dissociation of a superexcited N2O molecule has been studied b
y measuring dispersed vuv fluorescence spectra of dissociation fragmen
ts as a function of the excitation wavelength. Obtained spectra are pr
esented as a two dimensional fluorescence excitation spectrum (2D-FES)
. The 2D-FES clearly shows the complex neutral dissociation behavior o
f superexcited states of N2O.