THE VELOCITY OF 2ND SOUND NEAR THE LAMBDA-TRANSITION IN SUPERFLUID HE-4

被引：13

作者：

ADRIAANS, MJ

SWANSON, DR

LIPA, JA

机构：

[1] Department of Physics, Stanford University, Stanford

来源：

PHYSICA B | 1994年 / 194卷 / pt 1期

关键词：

D O I：

10.1016/0921-4526(94)90696-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report new high precision data on the velocity of second sound close to the lambda transition of He-4 at the saturated vapor pressure. The second sound wave is detected by a powdered salt pill of copper ammonium bromide in direct contact with the liquid helium. With a thermometer noise of less-than-or-equal-to 10(-10)K/square-rootHz we are able to make measurements in the linear regime to within 20 nanokelvin of the lambda point. We have obtained reasonable agreement with renormalization group theory predictions after allowance for the effect of gravity. The results are also compared with previous experiments.

引用

页码：733 / 734

页数：2

共 8 条

[1] BEHAVIOR OF THE BOREL RESUMMATIONS FOR THE CRITICAL EXPONENTS OF THE N-VECTOR MODEL [J].