YIELD OF OZONE IN PULSE RADIOLYSIS OF GASEOUS OXYGEN AT VERY HIGH DOSE RATE . USE OF THIS SYSTEM AS A DOSIMETER

A yield of ozone of 13.8±0.7 molecules/100 eV was determined in the pulse radiolysis of oxygen at 1 atm by high-energy electrons at a dose rate of 1012 rads/sec. The absorbed dose was based on the energy absorbed in a thin aluminum calorimeter. While this yield is somewhat higher than a recently reported value of 10.2± 0.6 determined from the initial rate of formation in radiolysis by cobalt gamma rays at low dose rate, it is likely that there is little or no dose-rate dependence over the range from 10 2-1012 rads/sec. This system provides a simple and accurate dosimeter, and the in situ measurement of ozone offers the added advantage for systems in which the electron flux is nonuniform, that the average absorbed dose in the optical path is measured.