Temperature Dependence of the Sound Velocity in Liquid He-4

被引：13

作者：

Roach, Pat R. ^{[1
]}

Ketterson, J. B. ^{[1
]}

Abraham, B. M. ^{[1
]}

Kuchnir, M. ^{[1
]}

机构：

[1] Argonne Natl Lab, Argonne, IL 60439 USA

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 1972年 / 9卷 / 1-2期

关键词：

D O I：

10.1007/BF00655489

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have measured the temperature dependence of the sound velocity in liquid He-4 from 0.07 to 0.7 K for frequencies from 12 to 105 MHz. While the data show an approximate T-4 temperature dependence, the frequency ordering of the curves is observed to undergo an inversion at about 0.2 K. Above this temperature we confirm that the velocity shift decreases with frequency, while below this temperature we now find that the velocity shift increases with frequency as predicted by theory.

引用

页码：105 / 108

页数：4

共 15 条

[1] SOUND PROPAGATION IN LIQUID 4HE [J].