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Thermal expansion of solid parahydrogen at helium temperatures
1989 (engelsk)Inngår i: Soviet Journal of Low Temperature Physics, ISSN 0360-0335, Vol. 15, nr 8, s. 492-493Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Thermal expansion of solid parahydrogen is investigated in the temperature range from 0.9 to 5 K. The content of the orthomodification in parahydrogen is 0.13 at. %, and that of nonhydrogen impurities is less than 2 10 - 3 at. %. No anisotropy in thermal expansion was observed within the experimental error. The temperature dependence of the linear expansion coefficient can be described by the expression α=1.82 10 - 7 T3. The obtained values of α are in good agreement with the available data on compressibility and ([partial derivate]p/[partial derivate]T)V. The Grüneisen coefficient is γ=3αV/CV`T=2.00 ± 0.25.

Abstract [en]

Thermal expansion of solid parahydrogen is investigated in the temperature range from 0.9 to 5 K. The content of the orthomodification in parahydrogen is 0.13 at. %, and that of nonhydrogen impurities is less than 2 · 10 – 3 at. %. No anisotropy in thermal expansion was observed within the experimental error. The temperature dependence of the linear expansion coefficient can be described by the expression α=1.82 · 10 – 7 T3. The obtained values of α are in good agreement with the available data on compressibility and ([partial derivate]p/[partial derivate]T)V. The Grüneisen coefficient is γ=3αV/CV`T=2.00 ± 0.25.

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1989. Vol. 15, nr 8, s. 492-493
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URN: urn:nbn:se:ltu:diva-7398Lokal ID: 5c463ce0-f17b-11db-bb1b-000ea68e967bOAI: oai:DiVA.org:ltu-7398DiVA, id: diva2:980287
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Upprättat; 1989; 20070423 (ysko)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-04-25bibliografisk kontrollert

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