| Vibration properties of low-fraction hydrogen in deuterium ices |
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| 引用本文： | 王燕,董顺乐. Vibration properties of low-fraction hydrogen in deuterium ices[J]. 中国物理, 2005, 14(10): 1942-1945 |
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| 作者姓名： | 王燕 董顺乐 |
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| 作者单位： | Department of Physics, Ocean University of China, Qingdao 266071, China;Department of Physics, Ocean University of China, Qingdao 266071, China |
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| 基金项目： | 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 -95 meⅤ for hda-ice, at -95 meⅤ for ice-Ⅷ and at -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 -315 and -425 meⅤ, ice-Ⅱ at 307 and -415 meⅤ, hda-ice at 312 and -418 meⅤ, respectively. They are significantly higher than the values of ice-Ih at -299 and -406 meⅤ, respectively.
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| 关 键 词： | 中子散射 振动模式 光谱散射 高能传输 氢原子 |
| 收稿时间： | 2004-09-08 |
| 修稿时间： | 2004-11-082004-12-21 |
Vibration properties of low-fraction hydrogen in deuterium ices |
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| Wang Yan and Dong Shun-Le. Vibration properties of low-fraction hydrogen in deuterium ices[J]. Chinese Physics, 2005, 14(10): 1942-1945 |
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| Authors: | Wang Yan and Dong Shun-Le |
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| Affiliation: | Department of Physics, Ocean University of China, Qingdao 266071, China |
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| Abstract: | Inelastic incoherent neutron scattering spectra of D2O high-densityamorphous (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. |
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| Keywords: | neutron scattering defect vibration modes Gaussian fit |
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