Ultrasound Measurements of 4He Confined in a Nano-porous Glass

被引：3

作者：

Kobayashi, Toshiaki ^{[1
]}

Taniguchi, Junko ^{[1
]}

Saito, Ayanori ^{[1
]}

Fukazawa, Satoshi ^{[1
]}

Suzuki, Masaru ^{[1
]}

Shirahama, Keiya ^{[2
]}

机构：

[1] Univ Electrocommun, Dept Appl Phys & Chem, Tokyo 1828585, Japan

[2] Keio Univ, Dept Phys, Yokohama, Kanagawa 2238522, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2010年 / 79卷 / 08期

关键词：

ultrasound; nano-porous media; He-4; two-level system; superfluidity; SUPERFLUID TRANSITION; VYCOR GLASS; FILMS;

D O I：

10.1143/JPSJ.79.084601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have carried out ultrasound measurements for He-4 confined in a nano-porous glass, Gelsil. The sound velocity of Gelsil glass in a vacuum is determined by the two-level system (TLS) contribution. Regardless of whether He-4 in the pore is liquid or solid, there exists an additional sound velocity change due to the relaxation of ultrasound stresses by a thermal activation mechanism. It was found that the different heat treatment of Gelsil glass affects both this relaxation and the superfluidity of He-4 in the pore.

引用

页数：6

共 13 条

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