Behavior of Positive Hole in a γ-Irradiated 3-Methylpentane Glass at 77°K
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概要
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In order to elucidate the behavior of a positive hole in irradiated alkane glasses, the effect of solutes having ionization potential lower than that of a glass matrix molecule upon the decay of a trapped electron was examined in a 3-methylpentane glass at 77°K by means of electron spin resonance. The decay was found to be explained in terms of the superposition of two exponentially decaying processes, as in the absence of a solute. Although the fast process was not affected by a solute, the slow process was further slowed by the addition of a solute. The effect of a solute is described by the empirical relation, <I>k</I>⁄<I>k</I><SUB>0</SUB>=1⁄(1+<I>fN</I>), where <I>k</I> and <I>k</I><SUB>0</SUB> are the rate constants of the slow decay in the presence and in the absence of a solute, respectively. <I>N</I> is the mole fraction of a solute. The observed values of the slowing-down efficiency, <I>f</I>, increase in parallel with the decreasing values of ionization potential of solutes: 2-methyltetrahydrofuran, diethylether, methylvinylether, 2-methylpentene-1 and <I>n</I>-butylvinylether. The results are interpreted in terms of trapping of a positive hole by a solute molecule and positive hole tunneling from a hole trap to a trapped electron.
- 公益社団法人 日本化学会の論文
著者
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IRIE Masahiro
Faculty of Engineering, Kyushu University
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HAYASHI Koichiro
Faculty of Bioresources, Mie University
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Yoshida Hiroshi
Faculty of Engineering, Hokkaido University
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Okamura Seizo
Research Reactor Institute, Kyoto University
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