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Critical light scattering in4He near the gas-liquid critical point

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Abstract

Scattered intensities of light were measured near the gas-liquid critical point of4He at scattering angles of 30, 60, and 90° as functions of the reduced temperature ε=|T−T c |/T c along the critical isochore (T>T c ) and the coexistence curve (T>T c ). The temperature range was 3×10−5<ε<1.5×10−2. Critical exponents and coefficients describing divergence of the generalized susceptibility χ and the correlation length ξ are obtained as γ(T>T c )=1.31±0.02, v(T>T c )=0.66±0.02, ξ0 (T>T c )=4.2±0.6 Å, γ′(T>T c )=1.32±0.02, v′(T>T c )=0.68±0.02, ξ± (T>T c )=2.6±0.7 Å, η=0.06±0.06(T>T c ), 0.05±0.05(T>T c ), and χ0(T>T c )/x± (T>T c )=3.6±0.4. It is pointed out that the quantal nature of4He has remarkable influence on the critical behavior of4He in the above-mentioned temperature region.

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Authors and Affiliations

  1. Institute for Solid State Physics, The University of Tokyo, Roppongi, Minato-ku, Tokyo, Japan

    Seiichi Kagoshima, Kohji Ohbayashi & Akira Ikushima

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  1. Seiichi Kagoshima
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  2. Kohji Ohbayashi
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  3. Akira Ikushima
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Kagoshima, S., Ohbayashi, K. & Ikushima, A. Critical light scattering in4He near the gas-liquid critical point. J Low Temp Phys 11, 765–774 (1973). https://doi.org/10.1007/BF00654458

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