Theory of the Susceptibility and Specific Heat of He^3
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概要
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A gas model taking account of interatomic interactions is proposed for liquid He^3. Assuming that the interaction potential can be decomposed into Fourier components, 4πg(k)e^<ik・r>(r : interatomic distance), we describe the motion of the system using the method of Bohm and Pines. If we regard the expansion coefficients c_0, c_2, ・・・ of g(k)in powers of k as parameters and presume suitable values of these parameters with reference to the value of sound velocity proposed by Mikura, the experimental data of nuclear susceptibility χ and specific heat C_V, it be shown that the number of collectivemodes is of the order of one percent of the total degrees of freedom, so that the influence of the collective motion on χ and C_V is negligible in the vicinity of 0^0K. The deviations of χ and C_V from those which follow from the simple free particles theory arise mainly from the exchange interactions. Considering only these exchange energies but neglecting the influence of the collective motion, we can explain the temperature dependence of χ in the whole temperature range provided that we take account of the κ-dependence of the exchange energy per particle, while the temperature dependence of C_V is explained only up to 0.3^0K.
- 理論物理学刊行会の論文
著者
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Yomosa Sigeo
Department Of Physics Faculty Of Science Nagoya University
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Yomosa Sigeo
Department Of Physics Osaka University
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YOMOSA Sigeo
Department of Physics, Osaka University
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