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Within the frame work of Coulomb and proximity potential model (CPPM), the cold binary fission of even-even uranium isotopes with the mass numbers A=246, 248 and 250 has been studied. With respect to the mass and charge asymmetries, high Q value and a minimum in the driving potential corresponds to the most favorable fragmentation in the binary fission process. A nucleus with doubly closed shell or near doubly closed shell is always appearing as the heaviest nucleus in the favored channel of the binary fission of all the mentioned isotopes. Hence the role of the nuclear shell structure in the formation of fission products is revealed through our study. It is found that highest yield are for the fragments with isotope of Sn (Z=50) as one fragment. The calculated half lives using Proximity 2000 are compared with the values obtained using Proximity 1977 version, and found that the values using Proximity 2000 for binary fission of 246-250 U even-A isotopes are one order greater than the values obtained using Proximity 1977.

Isotopic Yield in Cold Binary Fission of Even-Even 246-250U Isotopes