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Features of the low-frequency internal friction in solid hydrogen

G. A. MarininPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovA. V. Leont’evaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovB. Ya. SukharevskiǐPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovT. N. AnisimovaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovYu. A. ProkhorovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov

Soviet Journal of Low Temperature Physicsjournal1985en

ABI

Annotatsiya

The temperature dependence of the low-frequency internal friction (LFIF) and shear modulus G in the temperature range 2–12.5 K have been studied in free-standing specimens of normal hydrogen, n-H2, by the inverted torsional pendulum method. Peaks were found in the LFIF at T≈ 5.5 and ≈ 9 K and also an increase in the internal friction background below 8 K . Over the whole temperature interval studied, the shear modulus and its low values are relatively constant. The anomalous behavior of the LFIF and G in n-H2 (compa red with the classical Ar) is associated with an increase in the mobility of defects in the low-temperature region and with an appreciable contribution of quantum fluctuations in internal friction processes in solid hydrogen at low temperatures.

Hali tarjima qilinmagan

Mavzular

Quantum, superfluid, helium dynamics Molecular Spectroscopy and Structure Solid-state spectroscopy and crystallography

Identifikatorlar

DOI: 10.1063/10.0031336

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