Thermal expansion of solid deuterohydrogen at helium temperatures

• 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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NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)

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