This is the equation of the stability curve on a z, A plot. To make Eq. 11 fit this curve we must put 7 = 83 mmu.
The constants a and 0 may be evaluated by fitting measured masses. Because there are only two constants, the problem is quite overdeter¬mined. One set of best values is a = 15.04 mmu and 0 = 13.35 mmu. Equation 10 in final form is