Resonance rovibronic Raman scattering of ammonia

L. D. Ziegler, B. Hudson

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56 Scopus citations


A resonance Raman (RR) spectrum of NH3 excited by 212.8-nm radiation (fifth harmonic of Nd: YAG) has been obtained. This frequency is in resonance with the v′ = 1 level of the X → A absorption band. High-quality RR spectra are observed even though the A state dissociates with near unity quantum yield. Direct spectral evidence is found for N-H stretching (v1) Franck-Condon activity in the resonant absorption and the excited-state geometry is seen to be planar (D3h). Resonance-enhanced rovibrational Raman structure is observed. The resonant emission is determined to be RR scattering and not resonance fluorescence by line-shape analysis. New bending (inversion) levels of the ground state are identified. Moderate success in fitting the observed RR intensities is found by using one-dimensional bending Franck-Condon factors.

Original languageEnglish (US)
Pages (from-to)1110-1116
Number of pages7
JournalJournal of Physical Chemistry
Issue number6
StatePublished - 1984
Externally publishedYes

ASJC Scopus subject areas

  • General Engineering
  • Physical and Theoretical Chemistry


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