Resumo

MONTOYA, M.. Coulomb effects in isobaric cold fission from reactions ²³³U(n_th,f), ²³⁵U(n_th,f), ²³⁹Pu(n_th,f) and ²⁵²Cf(sf). Rev. mex. fis. [online]. 2014, vol.60, n.5, pp.350-356. ISSN 0035-001X.

The Coulomb effect hypothesis, formerly used to interpret fluctuations in the curve of maximal total kinetic energy as a function of light fragment mass in reactions ²³³U(n_th,f), ²³⁵U(n_th,f) and ²³⁹Pu(n_th,f), is confirmed in high kinetic energy as well as in low excitation energy windows, respectively. Data from reactions ²³³U(n_th,f), ²³⁵U(n_th,f), ²³⁹Pu(n_th,f) and ²⁵²Cf(sf) show that, between two isobaric fragmentations with similar Q-values, the more asymmetric charge split reaches the higher value of total kinetic energy. Moreover, in low excitation energy windows, between two isobaric charge splits with different Q-values, the more asymmetrical fragmentations is preferred.

Palavras-chave : Fission fragments; kinetic energy; charge; mass; cold fission.

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