Roberts, John M.Brotzen, Franz R.2016-04-212016-04-211964Goodell, Joseph P. N. "Absorption of ultrasonic and hypersonic waves in LiF single crystals." (1964) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/89013">https://hdl.handle.net/1911/89013</a>.https://hdl.handle.net/1911/89013Attenuation of ultrasonic-hypersonic stress waves in LiF single crystals is analyzed. As a mechanism for attenuation the vibrating pinned-dislocation model of Koehler is treated; a resonant peak in attenuation vs frequency was sought. Some other mechanisms, including temperature dependence, are considered. Various causes of modulation of the exponential decay of the acoustic wave are discussed.65 ppengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.ThesisRICE0048reformatted digitalThesis M.E. 1964 GOODELL