Electron irradiation, energy absorbed calculation

Dosimetry. The dose rate of 2.0 X 1018 e.v. grams"1 min."1 in water vapor was based on the yield of hydrogen from ethylene, using G(H2) = 1.31 (23). Using this dosimetry, the yield of nitrogen from 700 torr N20 irradiated in the same experimental set-up at room temperature was G(N2) = 10.0 0.3. The relative dose rate was checked periodically with the Fricke dosimeter. The energy absorbed by each component in a mixture was calculated, assuming it to be directly proportional to the electron density of that component. 

In the ultraviolet spectrum of polyethylene taken at 77 °K. after an irradiation to a dose of 40 Mrads there is also a broad absorption band in the region of 310 m/x to be seen. This is shown more clearly in Figure 3 in terms of a plot of the difference in the absorbance between Curve 1 of Figure 2 and curve 2. Actually the A A values of Figure 3 were not calculated from curves 1 and 2 of Figure 2, but from similar curves observed in another experiment. It is unlikely that the 310 m/x band can be attributed to trapped electrons because the energy of this band, 4.0 e.v., is much greater than the depth of electron traps in polyethylene,... 

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