Transverse acoustic impedance of normal liquid 3He with 4He coating

We measured the transverse acoustic impedance of the normal liquid 3He at 16 MHz and 10 bar with and without 4He layers plated on a wall in the temperature range of 500 to 3 mK. The real component of the impedance gradually increased with cooling in the high-temperature hydrodynamic region and satur...

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Published inJournal of physics. Conference series Vol. 150; no. 3; p. 032106
Main Authors Tamura, Yuta, Murakawa, Satoshi, Wada, Yuichiro, Wasai, Masahiro, Saitoh, Masamichi, Aoki, Yuki, Nomura, Ryuji, Okuda, Yuichi
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.02.2009
Subjects
Acoustic impedance
High temperature
Low temperature
Physics
Temperature dependence
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ISSN1742-6596
1742-6588
1742-6596
DOI10.1088/1742-6596/150/3/032106

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Summary:We measured the transverse acoustic impedance of the normal liquid 3He at 16 MHz and 10 bar with and without 4He layers plated on a wall in the temperature range of 500 to 3 mK. The real component of the impedance gradually increased with cooling in the high-temperature hydrodynamic region and saturated in the low-temperature collisionless region. In the crossover region around 20 mK, the real component had a steep increase and the imaginary component was minimum. Overall change in the temperature dependence became smaller by 4He coating and we can obtain the specularity parameter S of the wall by fitting the temperature dependence of the experimental impedance to the theory.
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ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/150/3/032106