Abstract

The ratios of cumulative yields of the 135I isotope and the independent yield of 135Xe at photofission of 232Th, 238U, 237Np, 243Am, and 238Cm by bremsstrahlung radiation with a boundary energy of 25 MeV are measured. The selective gas transportation of fission fragments and a measurement of the spectra of their γ radiation were used. A large difference in the ratios of the yields for these targets was discovered: from 34 for 238U to 1.3 for 243Am. This difference is discussed based on the known ideas of the formation mechanism of fission fragments.

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