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On the viscosity of 4He near the superfluid transition

✍ Scribed by G. Ahlers


Publisher
Elsevier Science
Year
1971
Tongue
English
Weight
137 KB
Volume
37
Category
Article
ISSN
0375-9601

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We report new high precision data on the velocity of second sound close to the lambda transition of 4He at the saturated vapor pressure. The second sound wave is detected by a powdered salt pill of copper ammonium bromide in direct contact with the liquid helium. With a thermometer noise of < 10-1Β°K