Plasma bremsstrahlung emission at electron energy from low up to extreme relativistic values

We consider the bremsstrahlung of electrons of fully ionized plasma. Electron energy range extends from a few hundred electron volts before the extreme relativistic energies of several MeV. The results of calculations of effective slow-down rate of a single electron and the power emission from a volume of the plasma with Maxwellian electrons. At relativistic energies, the Born approximation yields highly accurate results. Correction to the Born approximation are considered for low-energy regimes. In the high-energy regimes numerical results are close to extreme relativistic analytic results. The formulas are suggested that approximate the results of numerical calculations.
Comment: 6 pages, 3 figures, ver. 2 with corrected typos