Experimental techniques of high-resolution inelastic X-ray scattering measurements for supercritical metallic fluids at high temperature and high pressure using synchrotron radiation at SPring-8

Abstract

We have conducted high-resolution inelastic X-ray scattering (IXS) measurements of supercritical metallic fluids at high temperature and high pressure using synchrotron radiation at SPring-8 in Japan. We developed a high-pressure vessel for IXS measurements pressurized by He gas up to 196 MPa and installed the highpressure gas apparatus in the experimental hutch. After the installation IXS experiments were carried out for supercritical fluid Hg to study atomic dynamics in the metal-nonmetal transition near the liquid-vapor critical point. Next the apparatus is used to study atomic dynamics in the semiconductor-metal transition in supercritical fluid Se. In this article we report the experimental technique at high temperature and high pressure in detail, and show recent results using the technique.

Computer simulation and modeling the metal to insulating transition of liquid mercury via pair, empirical, and many-body potentials

“…In short, the MC simulation of this study suggests metal to insulating transition occurs in 9.25 g/cm 3 . This result is in good agreement with both theoretically and experimentally studies [14,21,22,37] that the transition is predicted around density of 9 g/cm 3 .…”

“…In the same way, experimental procedures such measurements of the sound velocity (SV) based on the techniques of pulsed phase-sensitive [11,20], ultrafast acoustics (temporal) method [21], X-ray scattering (IXS) [22,23], and calorimetric measurements of speci c heat [24], were utilized for characterization this phenomenon.…”

Поверхнева Дифузія І Фазові Переходи В Адсорбованих Плівках Міді На Грані (112) Вольфраму

“…The experimental techniques based on measurements of inelastic X-ray scattering are effective in the case of 3D systems. High resolution in the investigation of supercritical metallic fluids was achieved using synchrotron X-rays [19,27].…”

Peculiar temperature dependence of dynamical sound speed in liquid Se50Te50 by inelastic x-ray scattering

“…Liquid Se 50 Te 50 of 0.2 mm thickness was mounted in a single-crystal (Tamura-type) sapphire cell of [44]. The cell was contained in a high-pressure vessel equipped with a large Be window covering 2θ from 0° to 20° [45]. In order to suppress the evaporation and to measure the spectra at T higher than the boiling point at the normal pressure, the vessel was filled with He gas (99.999% purity) at the pressure of approximately 10 MPa.…”