Science. 1988 Jul 1;241(4861):65-7. doi: 10.1126/science.241.4861.65.
The adaptability of laser-induced phonon spectroscopy to the determination of acoustic velocity and the equation of state in the diamond-anvil high-pressure cell is demonstrated. The technique provides a robust method for measurements at high pressure in both solids and liquids so that important problems in high-pressure elasticity and the earth sciences are now tractable. The velocity of sound and the density of methanol at 25 degrees C have been measured up to a pressure of 6.8 gigapascals. These results imply a higher density (by approximately 5 percent) for liquid methanol above 2.5 gigapascals than that given in existing compilations. The adiabatic bulk modulus increases by a factor of 50 at a maximum compression of 1.8. The thermodynamic Grüneisen parameters of methanol and ethanol both increase with increasing pressure, in contrast to the behavior of most solids.
激光诱导声子谱在金刚石压腔中测定声速和状态方程方面的适应性得到了证明。该技术为高压下的固液测量提供了一种可靠的方法，从而使高压弹性和地球科学中的重要问题变得可行。在 25 摄氏度下，甲醇的声速和密度已被测量到 68 吉帕斯卡的压力。这些结果表明，在现有的编目中，高于 2.5 吉帕斯卡的甲醇液体密度（约高 5%）更高。在最大压缩率为 1.8 时，绝热体积弹性模量增加了 50 倍。甲醇和乙醇的热力学 Grüneisen 参数都随压力的增加而增加，这与大多数固体的行为相反。
