Nuclear charge dispersion studies in the light-mass region formed in the fission of 238U by protons of energy 35-85 MeV

Cross sections for the independent formation of 76As and 78As, for the partially cumulative formation of 77As and 77Ge, and the cumulative formation of 79As, 78Ge, and 75Ge formed in the fission of 238U by protons of energies 35-85 MeV have been determined. Charge dispersion curves have been obtained. Values of (Zsub(A) -Zsub(p)) and full-widths at half-maximum of the curves show that the behaviour of these light-mass products is the same as their complementary fragment (A approximately 152). This is inconsistent with values found at A = 96. (author)