Article

Thermophysical Properties of Materials
2000. V. 38. № 4. P. 542–548
Blagonravov L.A., Orlov L.A., Skovorod'ko S.N., Alekseev V.A.
New refined data about the adiabatic thermal coefficient of pressure for liquid cesium in the region of anomalous behavior of thermal properties
Annotation
New experimental data are obtained about the temperature dependence of the adiabatic thermal coefficient of pressure (ATCP) for liquid cesium in the temperature range from $300$ to $630$ K. The measurements are performed in an improved facility which is a realization of the version of the method for ATCP measurements, in which the quasi-adiabatic variation of pressure is performed in a periodic mode [1]. The data on the temperature dependence of the ATCP of liquid cesium which were previously obtained in this facility [2] required additional verification because of inadequate reproducibility of the absolute values of measured quantities, this resulting from the inadequacy of the thermal contact between thermocouple and sample. In this study, new measurements of the ATCP for cesium are performed after the introduction of procedural improvements enabling one to reach a much higher degree of repeatability of results. This makes it possible to considerably refine the shape and location of the anomaly on the curve of temperature dependence of the ATCP. It is found that the refined parameters of the anomalous region of the ATCP are in good agreement with the respective parameters of the anomaly of the coefficient of thermal expansion [3], this leading one to detect features of second-order phase transition in the behavior of the observed anomalies.
Article reference:
Blagonravov L.A., Orlov L.A., Skovorod'ko S.N., Alekseev V.A. New refined data about the adiabatic thermal coefficient of pressure for liquid cesium in the region of anomalous behavior of thermal properties, High Temp., 2000. V. 38. № 4. P. 542