Radiation chemistry of glassy alkaline ice systems from a structural viewpoint
Structural considerations have been extensively applied to critically examine the radiation chemistry of ..gamma..-irradiated 10 M NaOH aqueous glassy systems at 77/sup 0/K. New mechanisms have been proposed for the production of O/sup -/ ions in such systems, based on theoretical and experimental results concerning the structural stabilization of these species by their immediate molecular environments. In addition, a model for the large-scale structure of NaOH aqueous glasses is proposed, based on available information on the nature of the trapped electrons in these systems and the spatial distribution of trapped electrons and O/sup -/ ions. This model involves very small clusters of hydrated Na/sup +/ and OH/sup -/ ions, with an internal structure similar to that in concentrated NaOH crystalline hydrates such as NaOH.4H/sub 2/O, embedded in a matrix of ice-like excess water. The overall radiation chemistry of alkaline glasses is then considered in terms of these two different types of regions, and it is proposed that O/sup -/ ions are localized in the ion clusters, while trapped electrons reside in the water-rich regions. 3 figures.
- Research Organization:
- Univ. of Illinois at Chicago Circle
- OSTI ID:
- 6478315
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 83:2; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400600* -- Radiation Chemistry
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
COMPARATIVE EVALUATIONS
DATA
DISPERSIONS
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
GLASS
HYDROGEN COMPOUNDS
HYDROXIDES
HYPOTHESIS
INFORMATION
IONIZING RADIATIONS
IONS
KINETICS
LOW TEMPERATURE
MIXTURES
OXYGEN COMPOUNDS
RADIATION CHEMISTRY
RADIATIONS
REACTION KINETICS
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SOLUTIONS
STRUCTURAL MODELS
TEMPERATURE DEPENDENCE
TRAPPING