\begin{document}$ 28\leqslant Z_1,Z_2,Z_3\leqslant 38 $\end{document} with comparable masses. The possible fission channels are predicted by the potential-energy calculations. Interaction potentials, Q-values and relative yields for all possible fragmentations in equatorial and collinear configurations are calculated and compared. It is found that ternary fission with formation of a double magic nucleus like \begin{document}$ ^{132}{\rm Sn} $\end{document} is more probable than the other fragmentations. Also, the kinetic energies of the fragments for the group \begin{document}$ Z_1 = 32 $\end{document}, \begin{document}$ Z_2 = 32 $\end{document} and \begin{document}$ Z_3 = 30 $\end{document} are calculated for all combinations in the collinear geometry as a sequential decay."> Tin-accompanied and true ternary fission of <sup>242</sup>Pu -
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