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In this paper, the influence of chemi-ionization processes in $H^*(n \ge 2) +H(1s)$ collisions, as well as the influence of inverse chemi-recombinationprocesses on hydrogen atom excited-state populations in solar photosphere, arecompared with the influence of concurrent electron-atom and electron-ionionization and recombination processes. It has been found that the consideredchemi-ionization/recombination processes dominate over the relevant concurrentprocesses in almost the whole solar photosphere. Thus, it is shown that theseprocesses and their importance for the non-LTE modeling of the solar atmosphereshould be investigated further.

Chemi-ionization in Solar Photosphere: Influence on the Hydrogen Atom excited States Population