Dynamical structure factors in binary liquids. III. Molten NaCl

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Abstract
The spectral functions corresponding to number and charge density fluctuations are evaluated in model molten NaCl over the range of wavevector (0.751<or=q<or=7.506), and the results are compared with the molecular dynamics data of Hansen and McDonald (1975). For the density fluctuation spectrum results are in very good agreement for all the momentum transfers. In the case of charge fluctuations, our formalism predicts an optic-mode peak only for q=0.751 and is unable to account for the three peak structure exhibited due to the cross-correlation of random forces of second order is important only for small wavevectors.