Related Experiment Video
Updated: Aug 13, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
High resolution photoabsorption and photofragment fluorescence spectroscopy of water between 10.9 and 12 eV
J-H Fillion1, J Ruiz, X-F Yang
1LERMA, UMR 8112 du CNRS, Observatoire de Paris, 5 pl. J. Janssen, 92195 Meudon, France.
Abstract:
This work presents absorption and photofragment fluorescence spectra of water (H2O and D2O) simultaneously recorded at rotational resolution and at room temperature, by means of a synchrotron radiation source in the range 10.9-12 eV, covering the nd intense series from n=3 to 8. The Rydberg states observed are assigned in the light of the most advanced theoretical work available [M. S. Child, Philos. Trans. R. Soc. London, Ser. A 355, 1623 (1997)], and by reference to the stretching and bending mode progressions. Comparison between absorption and fluorescence spectra is shown to reveal a fast predissociation mechanism involving the linear 3pb2 1B2 state, and permits the identification of its (0,14,0) vibrational level observed in the absorption spectra.
Related Concept Videos
UV–Vis Spectrum
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar absorptivity (ε) or log ε on the y-axis (ordinate)...
UV–Vis Spectroscopy: Beer–Lambert Law
Molecular Spectroscopy: Absorption and Emission
UV–Vis Spectroscopy: Molecular Electronic Transitions
UV–Vis Spectrometers
Atomic Spectroscopy: Absorption, Emission, and Fluorescence

