https://doi.org/10.1140/epjd/e2005-00001-5
The threshold electron impact spectrum of H2O
Institute of Physics, Pregrevica 118, P.O. Box 68, 11080 Zemun, Serbia and
Montenegro
Corresponding author: a jureta@fyam.ucl.ac.be
Received:
21
July
2004
Published online:
18
January
2005
The threshold electron spectrum of 
was
obtained using a high resolution electron impact spectrometer combined with
the penetrating field method for scattered electrons with energies close to
zero eV. The valence, triplet Rydberg states, as well as the resonances were
identified and are discussed in the energy region 5.2–14.3 eV. The
threshold spectrum confirms the influence of resonances on the enhancement
of the intensity of some Rydberg states above 10 eV. The vibrational spacing
of the observed transitions of the Rydberg states indicates that the water
molecule is excited in the symmetric stretching mode.
PACS: 34.80.Gs – Molecular excitation and ionization by electron impact
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005
