1994 Fiscal Year Final Research Report Summary
High-pressure Properties of Liquid and Solid CO_2 by Laser Brillouin Scattering
| Project/Area Number |
05455010
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
広領域
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| Research Institution | Gifu University |
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Principal Investigator |
SHIMIZU Hiroyasu Gifu University, Dept.of Electronics, Professor, 工学部, 教授 (80023258)
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| Co-Investigator(Kenkyū-buntansha) |
SASAKI Shigeo Gifu University, Dept.of Electronics, Assoc.Prof., 工学部, 助教授 (30196159)
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| Project Period (FY) |
1993 – 1994
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| Keywords | Acoustic Phonon Spectroscopy / Ultrahigh-Pressure Brillouin Scattering / Carbon Dioxide / Nitrous Oxide / Sound Velocity / Elastic Constant |
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| Research Abstract |
High-pressure acoustic Brillouin spectroscopy has been applied to molecular solids carbon dioxide (CO_2) and nitrous oxide (N_2O) at pressures up to 6 GPa and room temperature. The best fit of the angular dependence of Brillouin acoustic velocities between experimental values and calculations based on Every's expression for elastic waves of an arbitary direction yielded the orientation of CO_2 and N_2O cubic-phase crystal grown in the diamond-anvil high-pressure cell. In situ determinations of sound velocities, as a function of pressure, could be made for any direction, the refractive index, the density, and the elastic constants. The elastic properties of an isoelectronic pair, CO_2 and N_2O,are in vestigated in thier pressure-induced liquid and solid phases
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