specific ionization

During this convection, the different chemical constituents of the plasma, each having its specific ionization potential, enters into a progressively cooler region.

K. Narkiewicz-Jodko, 'Specific Ionization Characteristic of Cosmic Rays', in Bulletin international: Sciences mathématiques (Kraków, 1938)

Ionic radius: the nominal radius of the ions of an element in a specific ionization state, deduced from the spacing of atomic nuclei in crystalline salts that include that ion.