About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Physical Review Letters
Paper
Observation of second sound in NaF by means of light scattering
Abstract
Application of the technique of forced thermal light scattering allowed the observation of second sound in NaF in spite of the extremely weak coupling between light and thermal fluctuations. The velocity and damping were measured up to 23 K. These measurements extend the results of previous heat-pulse experiments in agreement with theory. © 1976 The American Physical Society.