The Visible Radiation from Helium in a Strong Shock Wave Page: 29
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vicinity of the Lin*. This required * source with which the intensity
could M »»rl<4 u a known way tad which emitted continuous radiation,
at least In the vicinity of the interesting be lisa lines. The calibra-
tion plate* which were used for all of the quantitative aeasurenents were
obtained with a 7-a Up filter,* the apect*\gr*ph, and an XP-2 muon flash
UMp.* The tjectnn wae continuc.ua with several line* superimposed on it,
but the line* were not It sated in the vicinity of interesting heiiun
lima. The flash Imp wan operated with 0.6 pfd at 2000 v.
A calibration waa placed on aany of the plate* which were used
for shock spectra with the 7-step f liter and a pho tor load imp. This
procedure v«u» aatiafactory for wavelength# of kJJO A or greater but not
for shorter wavelengths because the radiation was absorbed by the glass
envelope of the source. These calibration*, however, showed that varia-
tions between individual plate* were negligible, it was a'so necessary
to know how the response of the eeulalon varied with exposure tine, i.e.,
whether the reciprocity lav was obeyed. Expertarnta perfumed at UUK*
show a negligible reciprocity failure for tiaes greater than a ai ro-
Purchased fro* the Jarre 1-Asr. Company, kevtonviile, Mata.
Rhodiua evaporated on cryetal quart*. Each step was l .2 am wide and the
density steps were approxlaately 0.2. The density range waa froa o
(clear quarts) to 1.2.
^Purchased froa Edgtrton, Gemeshausen, and Grier. This is s
capillary discharge with a 1.2 aa dlamter Vycor casing and tungsten
electrodes spaced 6 aa apart.
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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/m1/36/: accessed July 18, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.