Interface motion and nucleation of solid helium-4 induced by acoustic waves.
Interface motion and nucleation of solid helium-4 induced by acoustic waves.
复制标题
声波引起的固体氦 4 的界面运动和成核。
DOI：
10.1103/physrevlett.90.075301
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发表时间：
2003
影响因子：
8.6
通讯作者：
Y. Okuda
中科院分区：
文献类型：
--
作者：
R. Nomura;Y. Suzuki;S. Kimura;Y. Okuda
实验观察到，在低温下液-固界面具有高度流动性的声辐射压力可以诱导氦-4的结晶和熔化。我们讨论了观察到的这一效应的反常反转作为温度的函数，以及通过声波脉冲在液相中的晶体或在固相中的液体气泡的成核。利用高速相机对高达1m/s的大界面速度进行了现场观测。
Crystallization and melting of helium-4 was experimentally observed to be induced by acoustic radiation pressure where the liquid-solid interface is highly mobile at low temperatures. We discuss the observed anomalous reversal of this effect as a function of temperature and the nucleation by acoustic wave pulses of crystals in the liquid phase or liquid bubbles in the solid phase. A high-speed camera was used for the in situ observation of large interface velocities as high as 1 m/sec.