ION CHEMISTRY.
Abstract
The paramagnetic relaxation characteristics of trapped electrons and hydrogen atoms in gamma-irradiated alkaline and acid ices respectively were studied by power saturation methods. The relaxation times were measured as a function of radiation dose, deuteration, phase and temperature. Line widths were measured under various conditions. The trapped electron EPR line is inhomogeneously broadened by nuclear hyperfine interactions; the spin-lattice relaxation mechanism is a cross relaxation process with 0(-). The electrons are trapped with a nonuniform spatial distribution in hydroxyl anion vacancies in radiation-produced spurs of 25 A radius. The trapped hydrogen atom EPR line is inhomogeneously broadened by nuclear hyperfine interactions and homogeneously broadened probably by dipolar spin-spin interactions; the spin-lattice relaxation mechanism is probably phonon modulation of the dipolar spin-spin interaction. The H atoms are trapped with spatial uniformity at interstitial sites near oxyanions. t-C4H9(+) reactions in liquid isobutene were also studied. An experimental technique for generating ions in the vapor by photoionization and then injecting them into a liquid with an electric field is described. A study of the C8 products showed that olefins predominate. Proton transfer is the important termination step for the t-C4H9(+) reactions but hydride transfer also occurs. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1966
- Accession Number
- AD0811582
Entities
People
- John Zimbrick
- Larry Kevan
- N. S. Viswanathan
Organizations
- University of Kansas