X‐Ray Compton Scattering Study of Liquid Sodium at Elevated Temperatures

Abstract

X‐ray Compton scattering measurements using synchrotron radiation are carried out for liquid sodium (Na) from 473 K up to 1273 K. Utilizing the liquid state allows us to realize a continuous density reduction by controlling temperature and pressure. Valence Compton profiles (CPs) clearly exhibit thermodynamic state dependence as the temperature increases. Experimental CPs, CP differences, and electron kinetic energy are compared with those of the electron gas model. Combined with the analysis using the Fourier‐transformed CPs, the observed behaviors can be reasonably explained by the reduction in the electron density with volume expansion of the liquid.

N-representable one-electron reduced density matrix reconstruction with frozen core electrons

“…It is thus helpful to deconvolute thermal motion effects to recover the ideal static 1-RDM. In this work, it is assumed that, given the large photon-electron energy transfer involved in the Compton scattering process, DCP are hardly affected by nuclear agitation at reasonably low temperature (Sternemann et al, 2000;Dugdale & Jarlborg, 1998;Matsuda et al, 2020). Therefore, temperature-induced alteration of experimental data is only taken into consideration for X-ray SF.…”