# Ionization related functionality (plasmapy.formulary.ionization)¶

This module gathers functions relating to ionization states and the properties thereof.

## Functions¶

 ionization_balance(n, T_e) Z_bal is the estimate average ionization level of a plasma in thermal equilibrium that balances the number density of ions in two different ionization states. Saha(g_j, g_k, n_e, E_jk, T_e) The Saha equation, derived in statistical mechanics, gives an approximation of the ratio of population of ions in two different ionization states in a plasma. Z_bal_(n, T_e) Alias for ionization_balance().