  The importance of some atom hydrogen collisions in AGN has been investigated.
The results are useful for better estimate of the hydrogen Balmer lines uxes,
which usage for effective temperature diagnostics in astrophysical plasma is
limited by errors from the line formation models. The data could be also useful
for modeling cooler and denser parts of AGN BLR clouds, as well as for the
investigation of Rydberg states of hydrogen and for the study of their in uence
during the cosmological recombination epoch. The results of the present work
suggest that the investigated processes are of interest for the research and
modelling of such media.
