definitely, that is in general a factor. Though erbium and platinum doesn't differ that much than it come to X-ray attenuation. Additionally - the X-ray absorp

definitely, that is in general a factor. Though erbium and platinum doesn't differ that much than it come to X-ray attenuation. Additionally - the X-ray absorption by the lattice is important in the low energy level setting like that NASA experiment (basically equilibrium conditions) as any absorbed energy is basically lost and would just radiate away, whereis in high energy Z shot (non-equilibrium inertial confinement situation) the absorbed energy would still result in increased temperature and pressure of the target.