Diffusion Constants of3He in Liquid Helium II
Author(s) -
Emiko Fukuda,
Ryogo Kubo
Publication year - 1963
Publication title -
progress of theoretical physics
Language(s) - English
Resource type - Journals
eISSN - 1347-4081
pISSN - 0033-068X
DOI - 10.1143/ptp.29.621
Subject(s) - physics , liquid helium , boltzmann constant , helium , diffusion , thermodynamics , helium 4 , boltzmann equation , helium 3 , constant (computer programming) , fick's laws of diffusion , atomic physics , mathematical physics , computer science , programming language
The diffusion constant Ds of He3 atoms in liquid helium II was measured by Garwin and Reich using spin echoes. It is now pointed out that Ds may in general differ from D if the solute-solute interaction becomes appreciable. The expressions of Ds and D are given and discussed from a general point of view. Then the expressions are simplified into approximation formulas that correspond to simplest solutions of the Boltzmann equations. The temperature and concentration dependence of Ds and D at low temperatures and low concentrations is discussed on fairly general assumptions. The existent data of D and Ds are reviewed on this basis. The difference of D and Ds seems to be significant.
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