Gamow-Teller strength in the region ofSn100

New calculations are presented for Gamow-Teller beta decay of nuclei near ${}_{}{}^{100}{}_{}{}^{}\mathrm{Sn}$. Essentially all of the ${}_{}{}^{100}{}_{}{}^{}\mathrm{Sn}$ Gamow-Teller decay strength is predicted to go to a single state at an excitation energy of 1.8 MeV in ${}_{}{}^{100}{}_{}{}^{}\mathrm{In}$. The first calculations are presented for the decays of neighboring odd-even and odd-odd nuclei which show, in contrast to ${}_{}{}^{100}{}_{}{}^{}\mathrm{Sn}$, surprisingly complex and broad Gamow-Teller strength distributions. The results are compared to existing experimental data and the resulting hindrance factors are discussed.