Radiochemical systems radiation chemistry

4 RADIOCHEMICAL SYSTEMS (RADIATION CHEMISTRY) sce also VolumC 3, 

As with photolytic systems radiolysis may be carried out by continuous or pulsed techniques. The latter will be dealt with in Chapter 2. The elucidation of the mechanism for a radiochemical system involves determining the extent of ion and hot molecule reactions, leading to the formation of radicals or intramolecular elimination products, and of radical processes. Very often a striking similarity is found between photolytic and radiolytic systems. The value of knlk for the reactions (17) and (14) 

If an electric field is applied across two electrodes in the mixture being irradiated in the saturation region the passage of electrons through the mixture does not cause increased ionisation, but does increase the number of excited molecules formed. Fast ion-molecule processes are unaffected by an electric field. In this way a clear distinction can often be made between the products of ion-molecule reactions and hot molecule processes .  

Several books on radiation chemistry have appeared recently - - one deals specifically with gases . Two reviews have appeared on the radiation chemistry of hydrocarbons . Radiation chemistry has also been the subject of many articles in Annual Reports of the Chemical Society and Annual Reviews of Physical Chemistry. Two recentcontributionsareby Collinson and Ausloos . Radiation Research Reviews is devoted solely to reviews in this general field, and the first issue contains another review by Ausloos. 

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A number of reviews of the effects of radiation chemistry on polymer systems have been published. The classic texts are those of Charlesby, Chapiro and Dole. " Since then a number of extensive reviews of the effects of radiation have been published. For example, the Polymer Handbook has previously tabulated lists of the radiochemical yields reported elsewhere.-" The ACS has published a number of collections of papers presented at radiation chemistry meetings,- -- and the two journals Radiation Physics and Chemistry and Polymer Degradation and Stability are of much interest. As mentioned above the proceedings of major meetings on radiation processing,-"and the text by Singb and Silverman provide an excellent overview of the field. 

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