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Письма в Журнал экспериментальной и теоретической физики, 2004, том 80, выпуск 2, страницы 118–123
(Mi jetpl2060)
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Эта публикация цитируется в 11 научных статьях (всего в 11 статьях)
КОНДЕНСИРОВАННЫЕ СРЕДЫ
Porosity dependence of sound propagation in liquid $^4$He filled aerogel
K. Matsumotoa, Y. Matsuyamaa, D. A. Tayurskiiba, K. Tajiric a Department of Physics, Kanazawa University, Kakuma-machi,
920-1192 Kanazawa, Japan
b Physics Department, Kazan State University, 420008 Kazan, Russia
c Ceramics Research Institute, National Institute of
Advanced Industrial Science and Technology, 463-8560 Magoya, Japan
Аннотация:
Longitudinal sound wave propagation has been studied in an aerogel-liquid $^4$He system for various porosities of aerogel. The superfluid transition was identified as the absorption peak, whose magnitude was suppressed by aerogel. The sound velocity was analyzed within a hydrodynamic theory in both normal and superfluid phases. The absorption peak due to phonon–roton interaction around 1 K was not observed even with the most porous aerogel. The low temperature sound velocity and attenuation show that direct collisions of phonons with aerogel strands plays an important role in the acoustic properties.
Поступила в редакцию: 27.05.2004
Образец цитирования:
K. Matsumoto, Y. Matsuyama, D. A. Tayurskii, K. Tajiri, “Porosity dependence of sound propagation in liquid $^4$He filled aerogel”, Письма в ЖЭТФ, 80:2 (2004), 118–123; JETP Letters, 80:2 (2004), 109–113
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl2060 https://www.mathnet.ru/rus/jetpl/v80/i2/p118
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Страница аннотации: | 171 | PDF полного текста: | 63 | Список литературы: | 38 |
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