MANIFESTATION OF DISSIPATION AND COMPRESSIBILITY IN THE EXPERIMENTS ON QUANTUM CAVITATION
Burmistrov S.N., Dubovskii L.B.

Received: March 23, 2000

PACS: 64.60.Qb, 47.55.Bx, 67.20.+k

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Cavitation in the liquid helium isotopes of ³He and ⁴He is considered. It is shown that the dissipative processes play an important role in the growth of the stable phase nucleus in the normal liquid ³He. This leads to the lack of the quantum behavior of cavitation in this system down to 2 mK, which is in contrast to the thermal-quantum crossover in the cavitation of the superfluid ⁴He at 600 mK. Below 180 mK, the dissipative ³He kinetics is of the Knudsen type. The high value 600 mK for the transition into the quantum kinetic behavior in ⁴He is related to the compressibility of a liquid, which, in particular, leads to a noticeable emission of sound with cavitation. The recent experiments on quantum cavitation in the liquid helium isotopes ³He and ⁴ He are discussed.