Ionization structure within a gas slab with a column density N_c = 10²³ cm⁻², log of the hydrogen density 10.0 [cm⁻³], and distance from the continuum sources log r = 18 [cm] corresponding to ≈1000 r_g, where the illuminated surface is at a depth h = 0 (left side), for the continuum of 3C 47 (left panel), and for a typical AGN continuum normalized to the same optical luminosity (middle panel). Rightmost panel: Force multiplier (filled lines) and kinetic temperature (dashed lines) as a function of the geometrical depth of the gas slab for 3C 47 (red) and an AGN continuum (black).