ESR line shape studies of trapped electrons in. gamma. -irradiated /sup 17/O enriched 10M NaOH alkaline ice glass: Model for the geometrical structure of the trapped electron
The ESR line shape and width of a trapped electron (e/subt//sup -/) has been measured in 34% /sup 17/O enriched 10M NaOH alkaline ice glass at 77 K. The second moment of e/subt//sup -/ due to /sup 17/O coupling is 134 G/sup 2/. Analysis of the second moment contributions from /sup 17/O coupling together with the constraint from electron spin echo studies that the e/subt//sup -/--O distance is greater than 2 A show that the e/subt//sup -/--/sup 17/O hyperfine coupling is mainly isotropic. Simulation of the e/subt//sup -/ ESR line under these constraints on /sup 17/O coupling and previous ones determined for H or D coupling for various numbers n of equivalent water molecules in the first solvation shell of e/subt//sup -/ give a best fit to the experimental line shape for n=6. For n< or =4 definite structure would be expected in the e/subt//sup -/ line shape which is not seen experimentally. The n=6 result together with previous data allows a rather complete geometrical description of the trapped, hydrated electron to be defined. (AIP)
- Research Organization:
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202
- OSTI ID:
- 7364428
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 64:8; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360605* -- Materials-- Radiation Effects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600 -- Radiation Chemistry
ALKALI METAL COMPOUNDS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
ELECTRONS
ELEMENTARY PARTICLES
EVEN-ODD NUCLEI
FERMIONS
GAMMA RADIATION
GLASS
HYDROGEN COMPOUNDS
HYDROXIDES
IONIZING RADIATIONS
ISOTOPE ENRICHED MATERIALS
ISOTOPES
LEPTONS
LIGHT NUCLEI
MAGNETIC RESONANCE
NUCLEI
OXYGEN 17
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOLYSIS
RESONANCE
SODIUM COMPOUNDS
SODIUM HYDROXIDES
STABLE ISOTOPES
TRAPPED ELECTRONS