Theory of the mass diffusion coefficient in superfluid for temperatures below 0.65 K
School of Physics and Astronomy, University of Nottingham
Nottingham NG7 2RD, UK
Accepted: 6 March 2002
A theory of 3He diffusion coefficient, D, in liquid 4He for temperatures below 0.65 K is presented. The theory is consistent with the experiments of Lamoreux et al. only if the recoil of the 3He quasiparticle is included. The theory predicts that DT7 is not constant for temperatures T below 0.5 K.
PACS: 67.40.Pm – Transport processes, second and other sounds, and thermal counterflow; Kapitza resistance / 67.40.Bz – Phenomenology and two-fluid models / 67.40.Yv – Impurities and other defects
© EDP Sciences, 2002