Abstract
Depolarized low-frequency Raman spectra of NaCl aqueous solution in the frequency region below 250 cm -1 have been investigated as a function of temperature. The spectral profiles have been analyzed with a superposition of one Cole-Cole type relaxation mode and two damped harmonic oscillator modes. The reciprocal relaxation time τ -1 changes linearly as a function of temperature below 320 K, which means that the relaxation time τ obeys Curie-Weiss law. The distribution parameter β in the Cole-Cole type relaxation formula decreases with decreasing temperature. With decreasing temperature the reciprocal relaxation time τ -1 goes down toward to zero more slowly than that in water, which means that the value of Curie constant of NaCl aqueous solution is larger than that of water.
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