Thermal conductivity of solid parahydrogen with methane admixtures

Автор(и)

  • A.I. Krivchikov B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47, Ave. Lenin, Kharkov, 61103, Ukraine
  • V.V. Sumarokov W. Trzebiatowski Institute for Low Temperature Physics and Structure Research of the Polish Academy of Sciences, P.O. Box 937, 50-950 Wroclaw, Poland
  • J. Mucha W. Trzebiatowski Institute for Low Temperature Physics and Structure Research of the Polish Academy of Sciences, P.O. Box 937, 50-950 Wroclaw, Poland
  • P. Stachowiak W. Trzebiatowski Institute for Low Temperature Physics and Structure Research of the Polish Academy of Sciences, P.O. Box 937, 50-950 Wroclaw, Poland
  • A. Jezowski W. Trzebiatowski Institute for Low Temperature Physics and Structure Research of the Polish Academy of Sciences, P.O. Box 937, 50-950 Wroclaw, Poland
  • O.A. Korolyuk B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47, Ave. Lenin, Kharkov, 61103, Ukraine

DOI:

https://doi.org/10.1063/1.1582336

Ключові слова:

PACS: 66.70. f, 67.80.Gb, 67.80.Mg

Анотація

The thermal conductivity of solid parahydrogen crystal with methane admixtures has been measured in the temperature range 1.5 to 8 K. Solid samples were grown from the gas mixture at 13 K. Concentration of CH4 admixture molecules in the gas varied from 5 to 570 ppm. A very broad maximum of thermal conductivity with absolute value of about 110 W/(m×K) is observed at 2.6 K. The data are interpreted by Callaway model considering phonons resonant scattering on quasi-local vibrations of CH4 molecules, phonon-grain boundary and phonon-phonon scattering processes. The increase of grain boundary scattering leads to the decrease of the maximum broadening. The analysis shows that the solid mixture of p-H2 and CH4 is a heterogeneous solution for CH4 concentration higher than 0.1 ppm.

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Опубліковано

2003-05-16

Як цитувати

(1)
Krivchikov, A.; Sumarokov, V.; Mucha, J.; Stachowiak, P.; Jezowski, A.; Korolyuk, O. Thermal Conductivity of Solid Parahydrogen With Methane Admixtures. ФНТ 2003, 29, 706-709.

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