Shock-induced shifts in the aluminum K photoabsorption edge.

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 ∼7 eV for compressions of ∼2.2 times the normal density. The results are interpreted using hydrodynamic simulations which incorporated a new model for calculating the K-edge energy in a dense plasma