NMR study of KOH-doped ice Ih.

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  • KAWADA Shuji
    Faculty of Technology, Fukui University of Technology
  • URUNO Satoki
    Faculty of Science, Kanazawa University (present address: Sanyo LSI design/system software Co. Ltd)
  • TAKAHASHI Hiroki
    Faculty of Science, Kanazawa University (present address: Komatu Co. Ltd)
  • HATANAKA Hiroshi
    Faculty of Education, Kanazawa University

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  • ＫＯＨ添加氷ＩｈのＮＭＲ
  • KOH テンカヒョウ Ih ノ NMR

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Spin lattice relaxation time T1 in KOH-doped ice was measured with the pulse NMR method between the temperature range from just below melting point to 100K(-173°C).The excitation magnetic frequencies were 13.1, 24.1, 31.4 and 47.5 MHz. Temperature and frequency dependence of T1 was successfully analyzed using two spin systems which have different proton motion states. Comparison of the temperature dependence of the coupling constant between two spin systems and that of the dielectric relaxation showed that the rapid dielectric relaxation excited by KOH doping corresponds to the transfer motion of protons on the hydrogen bond and is stabilized below about 200K.

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