Advanced radiation chemistry research : current status by International Atomic Energy Agency

By International Atomic Energy Agency

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By International Atomic Energy Agency

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25. If this is not done, good fits of calculated to measured data cannot be achieved [4]. For OH radical dimerisation, however, a fit could only be obtained if no such correction was applied to kdiff. The implication here is that -OH has a short spin lattice relaxation time so that spin reorientation occurs within the lifetime of the collision complex and all encounters lead to products. Estimates of the spin lattice relaxation time of the OH radical indeed indicated it to be very short [12]. To obtain a good correlation between measured and calculated results for a number of reactions of e-aq, Buxton and his collaborators found that the temperature dependence of the diffusion coefficient of e~aq had to be similar to that of water rather than those of H+ or OH-.

Karam, L. R. and Simic, M. , Detecting irradiated foods: Use of hydroxyl radical biomarkers. Anal. Chem. 60 (1988) 1117-1119. [114] Kochetkov, N. , Kudrjashov, L. L, and Chlenov, M. , Radiation Chemistry of Carbohydrates (Transi. O. Phillips) Oxford: Pergamon Press, (1979). , Free radical reactions of carbohydrates as studied by radiation techniques. Adv. Carbohydr. Chem. Biochem. 37 (1980) 7-77. , Conversion of D-fructose into 6-deoxy-D-threo-2,5-hexodiulose by y-irradiation: A chain reaction in the crystalline state.

Radiolysis increases the rate of corrosion by a factor of 10-20 fold [20], so that nuclear reactor cooling systems are particularly liable to corrosion. Additional problems arise due to the deposition of corrosion products (metal oxide particles) close to the reactor core. As well as adversely altering local heattransfer characteristics, their exposure to high energy radiations results in nuclear transformations and induced radioactivity. Subsequent deposition at sites remote from the core causes a serious hazard for maintenance personnel.

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