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- Soldatov, Alexander, et al.
(författare)
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Thermal expansion of solid H2 , HD, D2 at helium temperatures
- 1993
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Ingår i: Proceedings of the 13th General Conference of the Condensed Matter Division of the European Physical Society. - : Physica scripta. - 9187308096 ; , s. 1053-
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Konferensbidrag (refereegranskat)
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- Soldatov, Alexander, et al.
(författare)
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Thermal expansion of solid hydrogens
- 1992
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Ingår i: Soviet Journal of Low Temperature Physics. - 0360-0335. ; 18:2, s. 116-122
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Tidskriftsartikel (refereegranskat)abstract
- The linear thermal expansion coefficient α of solid deuterium with paramodification content of 2.25% was determined in the temperature interval 1.5-5.6 K. The contributions of the translational vibrations of the lattice αlat and the rotational motion of the molecules αrot to α are separated. The temperature dependence of αlat was determined by the expression αlat =1.475 · 10 - 7 T3+(4.5-7) · 10 - 10 T5. The possibilities of a universal description of the thermal expansion of cryocrystals with a central interaction, including quantum crystals of hydrogen isotopes, are discussed. A theoretical description is proposed and the temperature dependence of αrot is analyzed.
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- Aleksandrovskii, A. N., et al.
(författare)
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Thermal expansion of solid deuterohydrogen at helium temperatures
- 1990
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Ingår i: Soviet Journal of Low Temperature Physics. - 0360-0335. ; 16:11, s. 784-785
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Tidskriftsartikel (refereegranskat)abstract
- For the first time, the thermal expansion of solid deuterohydrogen (HD) is studied in the temperature range 1.2 to 5 K. The isotopic impurity concentrations are 1.5% H2 and 0.4% D2, the other impurities totalling less than 5 · 10 - 4%. It is shown that the thermal expansion coefficient of solid HD can be described by the expression [proportional]HD(K - 1)=1.38 · 10 - 7 T3 in the investigated temperature range. The isothermal compressibility ξT=(34 ± 6) · 10 - 10 Pa - 1 is predicted on the basis of the experimental results and literature data.
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