Bi-modal Isoscalar Giant Dipole Strength in $^{58}$Ni

The strength distribution of the isoscalar giant dipole resonance (ISGDR) in $^{58}$Ni has been obtained over the energy range 10.5--49.5 MeV via extreme forward angle scattering (including 0$^{circ}$) of 386 MeV $alpha$ particles. We observe a ``bi-modal ${E1}$ strength distribution for the first time in an A $<$ 90 nucleus. The observed ISGDR strength distribution is in good agreement with the predictions of a recent QRPA calculation.