Temperature effect on recol tritium ractions in solid alkanes at 20 to 300 K. Comparison of recoil T atoms with H (D) atoms in. gamma. radiolysis

Journal Article · Thu Jan 21 04:00:00 EST 1982 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100391a023· OSTI ID:5808160

Aratono, Y ^[1]; Tachikawa, E; Miyazaki, T; Kawai, Y; Fueki, K

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1. Japan Atomic Energy Research Institute, Ibaraki

Hydrogen atom abstraction by recoil T atoms in neopentane and decane-d/sub 22/ has been studied at 20, 77, 195, and 300 K by means of ESR spectroscopy and radiogas chromatography. The results are compared with the reaction of H (or D) atoms produced by ..gamma.. radiolysis. When the experiments are conducted at 77 K, the reaction or recoil tritium atoms in the neo-C/sub 5/H/sub 12/-i-C/sub 4/H/sub 9/D (2 mol %) and n-C/sub 10/D/sub 22/-n-C/sub 10/H/sub 22/ (10 mol %) mixtures do not parallel those of H and D atoms generated by ..gamma.. irradiation, whereas the results at other temperatures below and above 77 K (20, 195, and 300 K) are more nealy comparable. The different results at 77 K are attributed to the ability of H and D atoms but not T atoms to diffuse and react with i-C/sub 4/H/sub 9/D (or n-C/sub 10/H/sub 22/) solute molecules. The failure of the thermal diffusion of the T atoms at 77 K is explained by a model in which nearly all of the recoil T atoms react either by hot reaction or have a high probability of reacting with a fragment near the end of the path and only a few percent of them diffuse into the bulk matrix.

• OSTI ID: 5808160
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 86:2; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600 -- Radiation Chemistry
400701* -- Radiochemistry & Nuclear Chemistry-- Hot-Atom Chemistry
ALKANES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMISTRY
CHROMATOGRAPHY
COMPARATIVE EVALUATIONS
DATA
DECANE
DECOMPOSITION
DEUTERIUM
DEUTERIUM COMPOUNDS
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
ELEMENTS
EXPERIMENTAL DATA
GAMMA RADIATION
GAS CHROMATOGRAPHY
HOT ATOM CHEMISTRY
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INFORMATION
IONIZING RADIATIONS
ISOTOPES
LABELLED COMPOUNDS
LIGHT NUCLEI
LOW TEMPERATURE
MAGNETIC RESONANCE
MEDIUM TEMPERATURE
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
PENTANE
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
RADIOCHEMISTRY
RADIOISOTOPES
RADIOLYSIS
RECOILS
RESONANCE
SEPARATION PROCESSES
SOLIDS
SPECTROSCOPY
STABLE ISOTOPES
TEMPERATURE EFFECTS
TRITIUM
TRITIUM COMPOUNDS
ULTRALOW TEMPERATURE
YEARS LIVING RADIOISOTOPES
YIELDS