ABSORPTION-COEFFICIENTS OF PHOTONS IN PLASMA IN THE DIRAC-FOCK-SLATERMODEL AND COMPARISON OF THESE COEFFICIENTS WITH THE RESULTS OF SEMIEMPIRICAL METHODS

The Dirac-Fock-Slater (DFS) model is described for a substance with gi ven temperature and density. On the basis of this model, a method of c omputing the absorption coefficients of photons in plasma is proposed. For computation of photon absorption coefficients, and Rosseland and Planck lengths in a wide range of temperatures and densities (T congru ent-to 1 - 10(4) eV, rho congruent-to 10(-2) - 10(2) g/cm3), a FOTON p rogram is elaborated. The absorption coefficients for plasmas of air, Al, Fe, and Au are calculated. Some results obtained within the DFS mo del are compared with those obtained using other techniques and by exp eriment.