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where


     C2 = NH/NTOT, C3 = NH+/NTOT,   Ce = N/NTOT    (5.70) K*()  2m k 3/2

     K*(T) =- N1TOT[2 UH (-h       T3/2 e-E/       (5.71)
             NTOTLuH       h2           &Hkj       (.1


Combining (5.67), (5.68), and (5.69) and solving the resulting equation for Ce gives


               C2 = K*( 1 + Vl + l/K*)             (5.72)


Since K* is determined by the plasma temperature according to (5.71), the concentrations Ce, C3, and C2 are evaluated directly, using (5.72), (5.68), and (5.69). The particle densities are obtained from (5.70).


Lowering of Ionization Potentials

        The lowering of ionization potentials with increasing charge density was discussed in Chapter IV with reference to the uranium plasma. Potential lowering will occur in the same manner in the hydrogen plasma and will be calculated using (4.38). The complete calculation of the hydrogen plasma composition, including the effects of ionization potential lowering and the cut-off quantum number of atomic hydrogen, is accomplished by the HPLAZ program, using the following iterative method: