ABSTRACT: Cerium has a complex phase diagram that is explained by the presence of structural phase transitions. Experiments to measure
the sound velocities in cerium by two methods were carried out to determine the onset of cerium melting on the Hugoniot. In
the pressure range 4–37 GPa, the sound velocity in cerium samples was measured by the counter release method using manganin-based
piezoresistive gauges. In the pressure range 35–140 GPa, the sound velocity in cerium was measured by the overtaking release
method using carbogal and tetrachloromethane indicator liquids. The samples were loaded with plane shock wave generators using
powerful explosive charges. The onset of cerium melting on the Hugoniot at a pressure of about 13 GPa has been ascertained
from the measured elastic longitudinal and bulk sound velocities.
Journal of Experimental and Theoretical Physics 05/2012; 112(2):212-219. · 1.03 Impact Factor