caa a22 4500 445365544 CHVBK 20180317142929.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s10909-010-0298-9 doi (NATIONALLICENCE)springer-10.1007/s10909-010-0298-9 Acoustic Resonance of Superfluid 3He in Parallel Plates [Elektronische Daten] [K. Obara, C. Kato, S. Sasamoto, H. Yano, O. Ishikawa, T. Hata] We performed an acoustic resonance experiment of superfluid 3He confined in a stack of parallel plates, and found the fourth sound resonance. From its velocity, the superfluid density fraction was calculated. No size effect was found because the gap between parallel plates were much larger than the superfluid coherence length. The energy loss of the resonance was also measured. We found that the hydrodynamic theory qualitatively described its temperature dependence, but it could not describe the gap width dependence. Possible explanations is discussed in the text. More over, we found the unidentified resonance that cannot be explained by conventional sound modes. Springer Science+Business Media, LLC, 2010 Superfluid 3He nationallicence Restricted geometry nationallicence Hydrodynamics nationallicence Obara K. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut Kato C. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut Sasamoto S. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut Yano H. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut Ishikawa O. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut Hata T. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/3-4(2011-02-01), 190-195 0022-2291 162:3-4<190 2011 162 10909 https://doi.org/10.1007/s10909-010-0298-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-010-0298-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Obara K. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut NATIONALLICENCE 700 1- Kato C. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut NATIONALLICENCE 700 1- Sasamoto S. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut NATIONALLICENCE 700 1- Yano H. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut NATIONALLICENCE 700 1- Ishikawa O. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut NATIONALLICENCE 700 1- Hata T. Department of Physics, Osaka City University, 558-8585, Sumiyoshi-ku, Osaka, Japan aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/3-4(2011-02-01), 190-195 0022-2291 162:3-4<190 2011 162 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer