Hydrogen and deuterium in shock wave experiments, ab initio simulations and chemical picture modeling

TL;DR

This paper compares ab initio molecular dynamics and chemical picture models to experimental shock wave data for hydrogen and deuterium, providing insights into their behavior under extreme conditions.

Contribution

It offers a detailed comparison of physical and chemical modeling approaches against experimental data for shock compressed hydrogen and deuterium.

Findings

Good agreement between models and experiments across a wide pressure range

Ab initio simulations capture the physical behavior accurately

Chemical picture models provide complementary insights

Abstract

We present equation of state data of shock compressed hydrogen and deuterium. These have been calculated in the physical picture by using {\it ab initio} molecular dynamics simulations based on finite temperature density functional theory as well as in the chemical picture via the Saha-D model. The results are compared in detail with data of shock wave experiments obtained for condensed and gaseous precompressed hydrogen and deuterium targets in a wide range of shock compressions from low pressures up to megabars.