Abstract
The liquid - glass transition in n-propanol has been investigated in detail by measuring the pressure dependence of the Brillouin scattering spectra. Using a home-made Brillouin microscope equipped with a diamond anvil cell, backward-geometry spectra were measured as a function of pressure from 1 atm to 8.3 GPa. As the pressure increased, the Brillouin shift changed its slope from 5 GPa, at which the liquid - glass transition is induced. The experimental data were analysed using a spectral function based on the theory of viscoelasticity and the Vinet equation of state. This yielded the pressure dependences of the limiting zero- and infinite-frequency sound velocities, the relaxation time, and the density.
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