Correlation between fractional independent yields and neutron-to-proton ratio of fission products in low energy fission

Fractional independent yields of fission products in the thermal neutron-induced fission of 233U, 235U, 239Pu, 241Pu and in the spontaneous fission of 252Cf have been correlated with the neutron-to-proton ratio of the fission products. The yields of the products from a fissioning system, when plotted as a function of neutron-to-proton (N/Z) ratio of fission products, fall on two Gaussian distribution corresponding to light and heavy fission products. The centroids of the distribution or the most probable value of neutron-to-proton ratio is found to be very close to the N/Z of the fissioning nucleus. From the most probable value of N/Z the various parameters of charge distribution e.g. most probable mass Ap, most probable charge Zp, the mass dispersion σA and the charge dispersion σZ have been obtained and are in good agreement with the experimental values of Ap and Zp. (author)