Neutral decay of double-holed doubly excited resonances of N2.

Abstract

The neutral decay of doubly excited resonances (DER's) of ${\mathrm{N}}_{2}$ has been observed by measuring the excitation spectrum of vacuum ultraviolet fluorescence emitted from photodissociation fragments in the 20\char21{}38-eV region. A number of DER's with the [(1${\mathrm{\ensuremath{\pi}}}_{\mathit{u}}$${)}^{\mathrm{\ensuremath{-}}1}$(3${\mathrm{\ensuremath{\sigma}}}_{\mathit{g}}$${)}^{\mathrm{\ensuremath{-}}1}$(${\mathrm{\ensuremath{\pi}}}_{\mathit{g}}$${)}^{1}$:C $^{2}\mathrm{\ensuremath{\Sigma}}_{\mathit{u}}^{+}$]ns${\mathrm{\ensuremath{\sigma}}}_{\mathit{g}}$ Rydberg series (n=3\char21{}10) have been revealed. Rydberg progressions onto the ${\mathrm{N}}_{2}^{+}$(D $^{2}\mathrm{\ensuremath{\Pi}}_{\mathit{g}}$) state have also been observed. Strongly dissociative DER's correlating with satellites have been shown as broad peaks in the 23\char21{}33-eV region, which have appeared to have a correlation with the single-holed (X $^{2}\mathrm{\ensuremath{\Sigma}}_{\mathit{g}}^{+}$)${\mathrm{\ensuremath{\sigma}}}_{\mathit{u}}$ shape resonance.