Pulse radiolysis of crystalline D2O at 6 K

Autor:	Hugh A. Gillis, Norman V. Klassen, Zhennan Wu, George G. Teather
Rok vydání:	1983
Předmět:	Crystal Heavy water chemistry.chemical_compound Absorption spectroscopy Chemistry Annealing (metallurgy) Radiolysis Analytical chemistry General Physics and Astronomy Physical and Theoretical Chemistry Scavenging Nuclear chemistry
Zdroj:	The Journal of Chemical Physics. 78:2449-2455
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.445048
Popis:	In experiments on the pulse radiolysis of crystalline D2O ice at a nominal temperature of 6 K, yields of e−vis, e−ir and the OD radical have been measured as a function of accumulated dose. The yield of e−ir shows a large effect of dose, increasing from Ge=1.03×104 (G≂0.27) for a previously unirradiated crystal to Ge=4.1×104 (G≂1.08) for a sample that had received 300 krad. The effect of dose is decreased to about half by annealing at 12.5 K, but can only be completely eliminated by annealing above 100 K. The effect is interpreted as being due to the scavenging, by D and OD, of D2O+ which otherwise recombines with e−qf. The G of OD at 6 K for a previously unirradiated crystal was measured as 3.8; this is much higher than the previously reported G of OH from γ‐irradiated H2O ice at 4 K.
Databáze:	OpenAIRE
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