Abstract
Ultrasonic attenuation measurements were recorded in liquid argon as a function of frequency along several isotherms between 140 and 150.2 K and at pressures from saturated vapor to 1000 p.s.i. The ratio α/f2 was found to be frequency dependent below 30 MHz and to vary as A[T,ρ]f−5/2 + B[T,ρ]. The frequency independent term, B[T,ρ], was used to calculate the bulk viscosity.
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