Electron Spin Resonance of γ-Irradiated Triglycine Sulfate. II. Internal Motion of Hydrogens and the Activation Energy in Glycine (I)

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  • Kato Terumasa
    Department of Applied Physics, Faculty of Engineering, Nagoya University
  • Abe Ryuji
    Department of Applied Physics, Faculty of Engineering, Nagoya University

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  • Electron spin resonance of γ-irradiated triglycine sulfate-2-Internal motion of hydrogens and the activation energy in glycine-1-
  • Electron spin resonance of ガンマ-irradiated triglycine sulfate 2 Internal motion of hydrogens and the activation energy in glycine 1

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The directions of the CH bonds of \dotCH2COO− radical in TGS at liquid nitrogen temperature were determined. The activation energy for the exchange of two hydrogens in the radical was also determined to be 0.16±0.03 eV, from the temperature dependence of ESR spectrum. A motional narrowing of proton resonance line in NMR will be expected at about 110°K, if the two hydrogens in glycine (I) would exchange their positions to each other in the unirradiated TGS crystal.

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