The Recombination Rate Coefficient of Molecular Helium Ions in a Pulsed Afterglow at 1.86 Torr Page: 31
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31
29
Oskam has given a critique of earlier work and shown
that many of the earlier experiments in which the
electron density was measured failed to meet Gray and
25
Kerr's criteria for the method.
A comparison with Eq. (34) shows that this approach
is equivalent to ignoring He+ and assuming that diffusion
loss is neglible and that there are no sources of
ionization producing He + . Even more important is the
+
fact that some source terms of He , which may
significantly influence the electron decay, are ignored.
4*
Before evaluating the concentrations of He in
2
terms of spectroscopically observed quantities, it is
necessary to evaluate the rotational partition functions
in Eq. (21) .
Temperature Dependence
of Molecular Saha Levels
The expression for the temperature factor appearing
in the atomic Saha level expression may be found in
Appendix I or from an analog to Eq. (19) in which the
rotational partition functions are equal to one. The
partition functions appearing in Eq. (19) must be
evaluated for the molecular case.
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Hicks, Helen Segrave. The Recombination Rate Coefficient of Molecular Helium Ions in a Pulsed Afterglow at 1.86 Torr, dissertation, August 1972; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc164573/m1/44/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .