The self-diffusion coefficient in Kr has been measured throughout a large range of densities (0.35<ρ<2 g/cm³) at temperatures near the critical one. The results are compared with molecular-dynamic calculations and with the CH₄ behavior. Although the qualitative agreement is good, disagreement from a quantitative point of view was found. The "normal behavior" of the self-diffusion coefficient in the critical region has been deduced.
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Carelli et al. (1973) studied this question.
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