Published in Physical Review B, Volume 34, Issue 7, October 1, 1986, pages 4924-4927.
Copyright © 1986 American Physical Society. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Physical Society. The following article appeared in Physical Review B and may be found at http://dx.doi.org/10.1103/PhysRevB.34.4924.
NOTE: At the time of publication, the author Matthew Moelter was not yet affiliated with Cal Poly.
We have calculated the reflection and transmission coefficients of acoustic waves propagating across a solid-liquid interface of 4He, using an extension of the treatment of Castaing and Nozières in which we include pressure changes associated with second sound. These calculations account well for the experimental results obtained over the temperature range 0.83 K≤ T ≤1.46 K and provide an alternative explanation to the one we offered previously for the lack of agreement between experiment and the theory of Castaing and Nozières.