DSpace width= university logo mark
Japanese | English 

KURA > B. 理工学域・研究域/理工学部/自然科学研究科 > b10. 学術雑誌掲載論文 > 1.査読済論文(理) >


ファイル 記述 サイズフォーマット
SC-PR-MATUSMOTO-32054.pdf105.4 kBAdobe PDF
タイトル: Frequency dependence of fast mode ultrasound attenuation of liquid <sup>4</sup>He in aerogel
著者: Matsumoto, Koichi link image link image
Tsuboya, Hiroyuki
Ohmori, K.
Abe, S.
Suzuki, H.
Tayurskii, Dmitrii A.  
松本, 宏一
発行日: 2009年
出版社(者): Institute of Physics
雑誌名: Journal of Physics: Conference Series
ISSN: 1742-6588
巻: 150
号: 3
開始ページ: 32054
抄録: In our previous work, anomalous sound attenuation in superfluid phase was observed in liquid 4He filled in 97.0 % porous aerogel using longitudinal ultrasound at the frequency of 10 MHz. To understand the nature of the observed anomaly one needs to know the viscous coupling between normal component and aerogel strands. As far as the viscous penetration depth depends on frequency in the present work we have measured longitudinal ultrasound propagation in liquid 4He filled in 97.0 % porous aerogel at the frequencies 6, 10, and 15 MHz. In the normal phase the sound velocity had no frequency dependence and was reduced from that of bulk liquid, since the sound velocity in aerogel is smaller than in bulk liquid helium. The attenuation in normal phase is discussed using a viscoelastic theory. The obtained results indicated that the ultrasound experiment in normal phase was performed in low frequency or crossover regime. © 2009 IOP Publishing Ltd.
DOI: 10.1088/1742-6596/150/3/032054
URI: http://hdl.handle.net/2297/24298
資料種別: Conference Paper
版表示: author

このアイテムを引用あるいはリンクする場合は次の識別子を使用してください。 http://hdl.handle.net/2297/24298



Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - ご意見をお寄せください