Resolution of a Doublet Splitting of the Squashing Mode in Superfluid ³He-B

Authors

Zuyu Zhao, Northwestern University
Shireen Adenwalla, University of Nebraska-LincolnFollow
P. N. Brusov, Northwestern University
J. B. Ketterson, Northwestern UniversityFollow
Bimal K. Sarma, University of Wisconsin - Milwaukee

Date of this Version

1990

Citation

Physical Review Letters, Volume 65, Number 21, November 1990

Comments

Copyright 1990 The American Physical Society

Abstract

The single-ended, cw impedance technique has been employed to study the squashing mode of superfluid ³He-B in a sound cell with a path length of 381 µm with ultrasound frequencies of 115.8 and 141.6 MHz. A doublet splitting of the squashing mode has been observed and the width of the splitting is dependent on the thermal gradient within the acoustic cell, which strongly suggests that the observed phenomena is induced by superflow.