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  • Access by Xinjiang University

Ultrasonic Velocities in Solid Argon

Herbert R. Moeller* and Charles F. Squire

  • Texas A&M University, College Station, Texas

  • *Present address: Union Carbide Corporation, Linde Division, Tonawanda, New York. This paper is based in part on the Ph.D. thesis presented by H. R. M. at Texas A&M University, College Station, Texas.

Phys. Rev. 151, 689 – Published 11 November, 1966

DOI: https://doi.org/10.1103/PhysRev.151.689

Abstract

The pulse technique of echo ranging was used to measure the velocities of ultrasonic waves in cylindrical samples of solid argon for temperatures from 74°K to the triple point (83.80°K). The center portion of these cylinders of solid argon transported the acoustic waves in the manner of a single crystal. The direction of propagation of the ultrasonic waves was deduced to be [110]. Making use of the data of Jones and Sparkes for average continuous transverse waves taken at temperatures from 18 to 62°K, these pulsed ultrasonic-velocity data were extrapolated to the following values at 0°K: vl=1555 m/sec; vt1=1000 m/sec; vt2=835 m/sec. The elastic constants at 0°K calculated from these values were c11=4.819×1010 dyn/cm2; c12=1.277×1010 dyn/cm2; c44=1.235×1010 dyn/cm2.

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