The Visible Radiation from Helium in a Strong Shock Wave Page: 93
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ntion of the ratio of the intensities of line spectra and continuum with
thermodynamic state can be predicted and the results compared with experi-
According to Eq. (VI-U), the total energy emitted in a line per
cubic centimeter per second is approximately
Thus for a given line and for a given temperature, CN“ne whcre
H is the total number of helium nuclei per cubic centimeter.
Relations for the energy emitted in the form of continuum are
found in Chapter 5* For brcmsstrahlung
and for recombination radiation
The temperature varied only slightly in the ej^riraents, but the
ion density, varied significantly with the intiial helium pressure
in the shock tube, so
where is the integrated energy in a line and Er is the continuum
energy for any narrow region of the spectrum.
Evaluating H-ne/ne for initial pressures of 20 and 35 ram Hg gives
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Seay, Glenn Emmett. The Visible Radiation from Helium in a Strong Shock Wave, report, January 1957; Los Alamos, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc502356/m1/100/: accessed June 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.