| Project/Area Number |
26610116
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | Hiroshima University |
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Principal Investigator |
KAJIHARA Yukio 広島大学, 総合科学研究科, 助教 (20402654)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | ゆらぎ / 液体－液体相転移 / 非弾性Ｘ線散乱 / 超音波 / 水素結合系 / 高圧 / 液体 / 相転移 / アルコール |
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| Outline of Final Research Achievements |
We have studied the relation between the thermodynamics and liquid-liquid phase transition in liquid systems by the sound velocity measurements with the combination of inelastic x-ray scattering and ultrasonic methods. In water-methanol mixture system, the ultrasonic sound velocity (v_US) exhibits maximum in the concentration dependence. On the other hand, IXS sound velocity (v_IXS) show simple linear variation in both concentration and temperature dependences. The "fluctuations" or relaxation intensity of the system, defined by the parameter v_IXS/v_US, becomes larger in the lower-methanol and lower-temperature region, which indicates that these fluctuations arises from the liquid-liquid phase transition of pure water located in the supercooled region.
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