[en] In a recent work were reported measurements done to energy which was to the Coulomb barrier for the ⁶ He + ²⁰⁹ Bi system. The fusion excitation function measured for this system shows a strong enhancement with respect to the predictions of the penetration model of unidimensional barrier at minor energies to the Coulombian barrier. In basis with the results obtained for different degrees of freedom it was determined with the CCDEF code, that the transfer of 2 neutrons of ⁶ He to binding states to ²⁰⁹ Bi, producing ²¹¹ Bi, is the mechanism looked as the best candidate for explain the great enhancement in the fusion excitation function of this system at energies under Coulomb barrier. It is corroborated what was affirmed by others authors about the strength value at 1.5 MeV as a typical value for the transference of two particles between the projectile and the target. (Author)