The velocity of diffusion flow in bcc 3He
N. E. DyuminB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukranian Academy of Sciences, 310164 KharkovВ. В. БойкоB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukranian Academy of Sciences, 310164 KharkovN. V. ZuevB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukranian Academy of Sciences, 310164 KharkovV. N. Grigor’evB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukranian Academy of Sciences, 310164 Kharkov
ABI
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The self-diffusion coefficient of an atom is measured in bcc 3He for a molar volume of 24.40 cm3/mole in the temperature range 0.48–0.68 K. The observed nonexponential change in diffusion with temperature is associated with tunneling of thermal vacancies in the investigated helium crystals.
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