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      12
N =   I Z. N. e   i=O


where


Zi = charge of i-th uranium ion


        The temperature, pressure and total particle density are related by the equation of state for a perfect gas. The total pressure is the sum of the partial pressures of the individual species as given by



                    P =  Pi = NTOT kT
                         1iO


NTOT kT =


                 12
NikT = NekT +    I NikT
1               i=O  1


             12
N TOT  N e+  I N.
   NTOT= Ne i=0


(4.4)


where


NTOT = total particle density


        The right side of the Saha equation (4.2) is dependent on the temperature as given by


               (T)  U*~   2 mek 3/2
                    u.          3 / T3/2 e-Ei/kT


The i-th Saha equation is then written as


(4.5)


(4.3)