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Found hysteresis of the dependence of photolysis rate on light intensity is directly
connected with radicals concentration. At successive decreasing of light intensity radicals
concentration, during the experiment, has remained invariable and equal to maximum
stationary concentration of radicals, achieved at the greatest light intensity.
Figure 2.2. Dependence of the rate of the acetic acid accumulation on light intensity at 25°C in vacuum.
Figure 2.3. Effect of light intensity on the rate of acetic acid accumulation at successive increase (I) and
decrease (2) of light intensity at irradiation of one and the same CA film in vacuum at 25°C.
Accordingly, the rate of acetic acid formation in these, specially chosen, conditions was
proportional to light intensity at constant concentration of radicals. And if there is possibility
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