Resonances in ultracold collisions of ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$, and ${}_{}{}^{23}{}_{}{}^{}\mathrm{Na}$

We investigate the resonance properties of ultracold ground state ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$${+}^6$Li, ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$${+}^7$Li, and ${}_{}{}^{23}{}_{}{}^{}\mathrm{Na}$${+}^{23}$Na collisions. The locations of various resonances and their corresponding error bounds due to the uncertainty of the interatomic potentials are presented. Also, the resonance widths are computed using rigorous coupled-channel calculations, as well as a modified version of Feshbach theory valid for strong fields.