In this paper, the diffusion source model and the structure of magnetized accretion disk with self-gravity are used to study the density and the ionization parameter of the HII and HI* zone, of which most likely the broad line emitting region consists. Two different densities and ionization parameters are determined: the first (n(HII)) and E(HII), corresponding to the mean density and ionization parameter in the completely ionized HII zone, and the second, (n(HI*)) and E(HI*), to the mean density and ioniz...
