Radiation chemistry of low-temperature aqueous glasses. Part 3.—Alkaline glasses either pure or containing organic chloride
On irradiation with γ-rays at 77°K alkaline glasses give small yields of products, G(H2)= 0.12 = 2G(O2), and develop e.s.r. and optical spectra (GÎµ= 3.7 ± 0.2 × 104 for 6N NaOH and 4.2 ± 0.2 × 104 for 8N NaOH at λmax= 588 nm) characteristic of the trapped electron e–t. When organic halides RCl are present, the optical and e.s.r. spectra show that G(e–t) is diminished and R· radicals are formed. The kinetics of thermal decay of e–t in these glasses can be interpreted on the bases : (a) that the main decay reaction is [graphic omitted], and (b) that the trapped electrons are divisible into two or more groups distinguished by temperature-dependent, characteristic half-lives of first-order decay. These and related effects are discussed.