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Chinese Physics, 2005, Vol. 14(10): 1942-1945    DOI: 10.1088/1009-1963/14/10/005
NUCLEAR PHYSICS Prev   Next  

Vibration properties of low-fraction hydrogen in deuterium ices

Wang Yan (王燕), Dong Shun-Le (董顺乐)
Department of Physics, Ocean University of China, Qingdao 266071, China
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.
Keywords:  neutron scattering      defect vibration modes      Gaussian fit  
Received:  08 September 2004      Revised:  21 December 2004      Accepted manuscript online: 
PACS:  61.50.Ks (Crystallographic aspects of phase transformations; pressure effects)  
  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)  
Fund: 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.

Cite this article: 

Wang Yan (王燕), Dong Shun-Le (董顺乐) Vibration properties of low-fraction hydrogen in deuterium ices 2005 Chinese Physics 14 1942

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