Homogeneous nucleation of crystals by acoustic waves
Homogeneous nucleation of crystals by acoustic waves
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DOI：
10.1209/epl/i2006-10075-y
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发表时间：
2006-07
期刊：
影响因子：
1.8
通讯作者：
R. Ishiguro;F. Caupin;S. Balibar
中科院分区：
文献类型：
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作者：
R. Ishiguro;F. Caupin;S. Balibar
为了研究晶体在加压液体中的均匀成核，我们在超流氦-4中聚焦了高强度声波。我们研究了光在声焦点的散射，发现了第一个实验证据，即超过一定的波幅，正压力摆动结晶液体在其路径上，我们讨论的成核时间和压力的测量的散射光强度的依赖性附近的液-固平衡压力。这项工作的未来发展是有关的亚稳极限的预测液体4 He在高压下超流性可能消失。
In order to study the homogeneous nucleation of crystals in a pressurized liquid, we focused a high-intensity acoustic wave in superfluid helium-4. We studied the scattering of light at the acoustic focus and found the first experimental evidence that, beyond a certain wave amplitude, positive pressure swings crystallize the liquid on their path. We discuss measurements of the nucleation time and of the pressure dependence of the scattered light intensity near the liquid-solid equilibrium pressure. Future developments of this work are related to the prediction of a metastability limit for liquid 4He at high pressure where superfluidity could vanish.