Irradiation temperature effects on hydrogen atom reactions upon radiolysis and photolysis at 4. 2 and 77 K of neopentane containing various additives as studied by electron spin resonance
Journal Article
·
· J. Phys. Chem.; (United States)
The cause of the suppression of the selective formation of solute radicals at 4.2 K in the radiolysis of neopentane containing additives has been studied by the electron spin resonance technique. The suppression of solute radical formation is characteristic of reactions of hydrogen atoms with solutes and becomes prominent with decreasing irradiation temperature, suggesting that the migration of hydrogen atoms to solute molecules is suppressed below 77 K. The suppression of the solute radical yield at 4.2 K in the high concentration range suggests that hydrogen atoms are almost immobilized at their place of birth and react only with surrounding molecules at 4.2 K. On the other hand, formation of solute radicals from the reactions of electrons and holes was not suppressed at 4.2 K. The behaviors of hydrogen atoms produced from HI photolysis in neopentane matrices were essentially the same as those in the radiolysis, indicating that the immobilization of hydrogen atoms at 4.2 K are mainly related to the nature of the matrices. 11 figures, 2 tables.
- Research Organization:
- Government Industrial Research Inst., Nagoya, Japan
- OSTI ID:
- 6036005
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 83:12; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Nature of the products of photolysis and radiolysis of CBr/sub 4/ at 77 K
Journal Article
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Thu Jun 14 00:00:00 EDT 1979
· J. Phys. Chem.; (United States)
·
OSTI ID:6191800
Effect of irradiation temperatures on hydrogen atom reactions in neopentane and its mixtures irradiated at 4. 2 and 77/sup 0/K as studied by electron spin resonance. [Gamma rays and x-rays]
Journal Article
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Thu Jul 14 00:00:00 EDT 1977
· J. Phys. Chem.; (United States)
·
OSTI ID:7094684
Nature of the products of photolysis and radiolysis of CBr/sub 4/ at 77 K
Journal Article
·
Fri Jul 01 00:00:00 EDT 1988
· High Energy Chem. (Engl. Transl.); (United States)
·
OSTI ID:5775082
Related Subjects
2-2-DIMETHYLPROPANE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500 -- Photochemistry
400600* -- Radiation Chemistry
ADDITIVES
ALKANES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CRYOGENIC FLUIDS
DECOMPOSITION
ELECTRON SPIN RESONANCE
ELEMENTS
FLUIDS
HYDROCARBONS
HYDROGEN
INHIBITION
IRRADIATION
LOW TEMPERATURE
MAGNETIC RESONANCE
MATRICES
NONMETALS
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
RESONANCE
TEMPERATURE EFFECTS
ULTRALOW TEMPERATURE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500 -- Photochemistry
400600* -- Radiation Chemistry
ADDITIVES
ALKANES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CRYOGENIC FLUIDS
DECOMPOSITION
ELECTRON SPIN RESONANCE
ELEMENTS
FLUIDS
HYDROCARBONS
HYDROGEN
INHIBITION
IRRADIATION
LOW TEMPERATURE
MAGNETIC RESONANCE
MATRICES
NONMETALS
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
RESONANCE
TEMPERATURE EFFECTS
ULTRALOW TEMPERATURE