  In a previous article, with a new code designed for a photoionized thick hot
medium using a full transfer treatment of both lines and continuum, we have
studied the He-like emission of a medium photoionized by an X-ray source. We
considered the influence of density, ionization parameter and column density.
We stressed that photoionized media are not uniform in temperature and we
showed that photoexcitation and large column densities should be considered to
avoid misinterpretation of the properties of the medium. To complete the
possible situations observed in photoionized plasmas, we consider here the
influence of microturbulence due for instance to a velocity gradient, of
different element abundance, and of different ionizing spectral distributions.
All new situations are computed using the same code, but with an improved
version of our He-like atomic model. We give values of the G and R ratios, the
equivalent width, and the ionic column densities with a greater accuracy than
previously achieved. A large microturbulence results in a decrease of the G
ratios for large column densities, for which the He-triplet resonant lines are
optically thick. On the contrary, the R ratio is almost independent of the
dispersion velocity and the element abundances, as long as the intercombination
lines are optically thin. Through two 'universal diagrams' not depending on any
parameter, we also present a way to determine the ionization parameter and the
total column density of the emitting regions from the temperature of the
observed radiative recombination continuum of a given ion and its column
density.
