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Ultrasound absorption studies in the critical region of lithium-ammonia solutions

1975; Elsevier BV; Volume: 51; Issue: 4 Linguagem: Inglês

10.1016/0375-9601(75)90531-9

1873-2429

D. E. Bowen,

Ultrasonics and Acoustic Wave Propagation

Measurement of the absorption of ultrasound in the critical region of lithium-ammonia solutions as a function of concentration, frequency, and temperature are presented. The absorption reaches a maximum at 4.2 mole percent lithium and is a function of the frequency. The frequency dependence can be explained either by a single relaxation at around 20 MHz or by using Fixman's theory with a correlation length of 51.3 Å.