Shock-induced shifts in the aluminum<i>K</i>photoabsorption edge

Abstract

We present results of studies on shock-induced shifts in the K-photoabsorption edge of aluminum. Time-resolved x-ray spectroscopic measurements indicated maximum red shifts of \ensuremath{\sim}7 eV for compressions of \ensuremath{\sim}2.2 times normal density. The results are interpreted using hydrodynamic simulations which incorporated a new model for calculating the K-edge energy in a dense plasma.