Abstract
High-resolution neutron transmission and elastic-scattering measurements on $^{207}\mathrm{Pb}$ have revealed a concentration of $p$-wave strength in $^{208}\mathrm{Pb}$ which is mainly accounted for by ${J}^{\ensuremath{\pi}}={1}^{+}$ resonances. The sum of the ground-state radiative widths for these resonances is $\ensuremath{\Sigma}{\ensuremath{\Gamma}}_{\ensuremath{\gamma}0}=7.2$ eV which agrees well with a one-particle-one-hole theoretical prediction which locates a fragment of the giant $M1$ resonance at 7.50 MeV with ${\ensuremath{\Gamma}}_{\ensuremath{\gamma}0}=9.3$ eV.
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