Über den Ionisationszustand und die Ausstrahlung von Fremdgasen in einem Wasserstoffplasma

An interpolation formula for ionization (and excitation) of ions is proposed, which holds for the whole energy range of the colliding electrons. With the aid of this formula a time constant is computed and discussed characterizing the time scale with which the ionization equilibrium of heavier ions is established. Elewert’s ionization formula is generalized for small parameters s=χ n /k T (χ n =ionization energy). The radiation of impurities namely free —free, free—bound, and excitation radiation are computed and discussed for such a plasma. The interaction of the radiation with the plasma is neglected.