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Phonon lifetimes in fused quartz at low temperatures |
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| Authors: | Howard E. Jackson Stephen Rand D. Walton |
| Affiliation: | Department of Physics, McMaster University, Hamilton, L8S 4M1, Canada;Department of Physics, University of Cincinnati, Cincinnati, Ohio, 45221, U.S.A.;Department of Physics, University of Toronto, Toronto, M5S 1A7, Canada;Department of Physics, McMaster University, Hamilton L8S 4M1, Canada |
| Abstract: | Thermal Brillouin scattering from fused quartz has been observed with high resolution at low temperatures. At 2.4 K the longitudinal phonons of ν = 33 GHz are very well-defined excitations, with a lifetime of (2.0±.2)×10-7 sec. This value is in substantial disagrement with those reported by Pelous and Vacher1. |
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