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Velocity and Absorption of High-Frequency Sound Near the Lambda Transitions in Solid CD4

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Low Temperature Physics-LT 13

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Abstract

Deuterated methane CD4 freezes at 89.6°K and in the solid phase undergoes two phase transitions characterized by lambda-type heat capacity maxima at 22.2 and 27.1°K.1At low pressures solid CH4 exhibits clearly only one phase transition at 20.48°K.1 The object of our study was to determine the acoustical properties associated with the phase transitions in CD4 and to compare the results with prior work2 on CH4. We have measured velocity and attenuation of 4- and 12-MHz longitudinal sound in CD4 at temperatures between 2 and 77°K and have observed discontinuities in the slope of the velocity vs. temperature curve and attenuation peaks in the vicinity of the transition temperatures.

Work supported by the National Science Foundation.

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References

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Author information

Authors and Affiliations

  1. Harvey Mudd College, Claremont, California, USA

    R. P. Wolf

  2. California State University, Los Angeles, California, USA

    F. A. Stahl

Authors
  1. R. P. Wolf
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  2. F. A. Stahl
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Editor information

Editors and Affiliations

  1. University of Colorado, Boulder, Colorado, USA

    K. D. Timmerhaus  & W. J. O’Sullivan  & 

  2. National Science Foundation, Washington, D.C, USA

    K. D. Timmerhaus

  3. Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico, USA

    E. F. Hammel

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© 1974 Plenum Press, New York

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Wolf, R.P., Stahl, F.A. (1974). Velocity and Absorption of High-Frequency Sound Near the Lambda Transitions in Solid CD4 . In: Timmerhaus, K.D., O’Sullivan, W.J., Hammel, E.F. (eds) Low Temperature Physics-LT 13. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-4520-6_35

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  • DOI: https://doi.org/10.1007/978-1-4613-4520-6_35

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-4522-0

  • Online ISBN: 978-1-4613-4520-6

  • eBook Packages: Springer Book Archive

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