Yields of fission products with masses A=131 to 135 for the fast neutron induced fission of U-238

Charge distribution of light mass fission products in the fast neutron induced fission of 232Th, 238U, 240Pu and 244Cm

Fractional cumulative yields (FCY) of various light mass fission products in the fast neutron induced fission of ²³²Th, ²³⁸U, ²⁴⁰Pu and ²⁴⁴Cm have been determined by using the off-line γ-ray spectrometric technique. From present and literature data, width of isobaric charge distribution (σ_Z), the most probable charge (Z_P) and the experimental charge polarization (∆Ζ_EXPT) as a function of fragment mass were deduced. The ∆Ζ_EXPT values from the present work for light mass chains and earlier work for heavy mass chains show oscillating nature due to nuclear structure effect. The ∆Ζ_MPE values based on minimum potential energy surface were theoretically calculated, which shows a systematic decrease trend with the approach of symmetric split due to the liquid drop behaviour of the fissioning nucleus.