Abstract
Measurements have been made of the temperature dependence of the attenuation at 9000 Mc/sec of two slow transverse, two fast transverse, and three longitudinal phonon modes in "perfect" natural-quartz specimens. The attenuation of the slow transverse waves follows the theory of Landau and Rumer. The attenuation of the longitudinal and fast transverse waves follow the theories of Maris and Shiren, which take into account the finite lifetime of the thermal phonons with which the microwave phonons interact, but some discrepancies still exist in the magnitude of the attenuation. The steps observed in the attenuation of imperfect quartz are identified as two peaks at 16\ifmmode\pm\else\textpm\fi{}3\ifmmode^\circ\else\textdegree\fi{}K and 24\ifmmode\pm\else\textpm\fi{}3\ifmmode^\circ\else\textdegree\fi{}K, sumperimposed on a phonon-phonon background. Possible mechanisms for these attenuation peaks are discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
