OH radical in water studied by Quantum beats on positron annihilation -the effect of water liquid structures

Singlet radical pairs of ortho-positronium and hydroxyl (OH) radical were generated in positron radiolysis in water. Quantum beats on the energy distribution of positron annihilation γ-rays caused by the reaction of electron-spin-correlated pairs of ortho-positronium and OH radical were newly measur...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 225; no. 1; p. 012030
Main Authors Lee, Jeong-Jae, Oka, Toshitaka, Hirade, Tetsuya
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.04.2010
Subjects
Electron spin
Energy distribution
Gamma rays
Physics
Positron annihilation
Positronium
Radiolysis
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Summary:Singlet radical pairs of ortho-positronium and hydroxyl (OH) radical were generated in positron radiolysis in water. Quantum beats on the energy distribution of positron annihilation γ-rays caused by the reaction of electron-spin-correlated pairs of ortho-positronium and OH radical were newly measured at 32°C by using positron annihilation age-momentum correlation (AMOC) measurement. The quantum beats can provide information of hyperfine coupling constants of the OH radical in water liquid structures, and hence can provide the information of change of the water liquid structures. The quantum beats appeared at 32°C could not be explained easily. The reason was continuous and slow change of water liquid structures at 32°C. The water liquid structures probably can be understood by using the positron annihilation quantum beat measurements.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/225/1/012030