Active bismuth devices at 4.2 K
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H.J. Goldsmid
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Article
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1977
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Elsevier Science
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English
⚖ 233 KB
It was found that the lowest temperatures for those amounts of cooled liquid He 4 shown in Table , could be kept without introducing extra power for at leat three hours. The natural heat leak of the system into the cooled He 4 was estimated 0.6 mW. Peshkov et al 9 had also cooled liquid He 4 in a c