中国物理B ›› 2005, Vol. 14 ›› Issue (10): 1942-1945.doi: 10.1088/1009-1963/14/10/005

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Vibration properties of low-fraction hydrogen in deuterium ices

王燕, 董顺乐   

  1. Department of Physics, Ocean University of China, Qingdao 266071, China
  • 收稿日期:2004-09-08 修回日期:2004-12-21 出版日期:2005-10-20 发布日期:2005-10-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10274034 and 10474085),and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, China.

Vibration properties of low-fraction hydrogen in deuterium ices

Wang Yan (王燕), Dong Shun-Le (董顺乐)   

  1. Department of Physics, Ocean University of China, Qingdao 266071, China
  • Received:2004-09-08 Revised:2004-12-21 Online:2005-10-20 Published:2005-10-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10274034 and 10474085),and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, China.

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摘要： Inelastic incoherent neutron scattering spectra of D2O high-density amorphous (hda) ice, ice-VIII and ice-II mixed with small amount of H2O (<5%) have been measured recently on high-energy transfer spectrometer at Rutherford Appleton Laboratory (UK). The hydrogen atom on D2O ice lattices has three distinguished vibrational modes, two bending at low frequencies and one stretching at high frequencies, and their frequencies are slightly different for different phases of ice. It was found that the lower one of the bending modes is located at \sim 95\,meV for hda-ice, at \sim 95\,meV for ice-VIII and at \sim 96\,meV for ice-II and they are all lower than the value of 104\,meV for ice-Ih. It was also measured that the O-D and O-H covalent bond stretching modes of ice-VIII are at \sim 315 and \sim 425\,meV, ice-II at 307 and \sim $415\,meV, hda-ice at 312 and \sim 418\,meV, respectively. They are significantly higher than the values of ice-Ih at \sim 299 and \sim 406\,meV, respectively.

关键词: neutron scattering, defect vibration modes, Gaussian fit

Abstract: Inelastic incoherent neutron scattering spectra of D2O high-density amorphous (hda) ice, ice-VIII and ice-II mixed with small amount of H2O (<5%) have been measured recently on high-energy transfer spectrometer at Rutherford Appleton Laboratory (UK). The hydrogen atom on D2O ice lattices has three distinguished vibrational modes, two bending at low frequencies and one stretching at high frequencies, and their frequencies are slightly different for different phases of ice. It was found that the lower one of the bending modes is located at ~95meV for hda-ice, at ~95meV for ice-VIII and at ~96meV for ice-II and they are all lower than the value of 104meV for ice-Ih. It was also measured that the O-D and O-H covalent bond stretching modes of ice-VIII are at ~315 and ~425meV, ice-II at 307 and ~415meV, hda-ice at 312 and ~418meV, respectively. They are significantly higher than the values of ice-Ih at ~299 and ~406meV, respectively.

Key words: neutron scattering, defect vibration modes, Gaussian fit

中图分类号:  (Crystallographic aspects of phase transformations; pressure effects)

  • 61.50.Ks
61.05.fg (Neutron scattering (including small-angle scattering)) 63.50.-x (Vibrational states in disordered systems) 61.43.Er (Other amorphous solids) 61.72.-y (Defects and impurities in crystals; microstructure)