FREE-FREE LIGHT-ABSORPTION IN STRONGLY COUPLED PLASMAS

The light absorption coefficient is evaluated in strongly coupled plas mas. Analysis is based on the calculation of the dynamic collision fre quency of electron-ion scattering. Under plasma conditions when electr on scattering has quantum character, the Born approximation for screen ed electron-ion interaction is used. In the case of classical scatteri ng non-Born corrections become essential at high frequencies. Interpol ation formulas for the collision frequency and Gaunt factor are presen ted at intermediate frequencies. Theoretical calculations are compared with measurements of bremsstrahlung for dense Ar and Al plasmas and c omputer simulation data.