Demonstration of Geometric Effects and Resonant Scattering in the X-Ray Spectra of High-Energy-Density Plasmas

In a plasma of sufficient size and density, photons emitted within the system have probability being reabsorbed reemitted multiple times---a phenomenon known in astrophysics as resonant scattering. This effect alters ratio optically thick to thin lines, depending on geometry viewing angle, has significant implications for spectra observed number astrophysical scenarios, but not previously been studied controlled laboratory plasma. We demonstrate x-ray by cylindrical plasmas generated high power laser irradiation, results confirm geometrical interpretation