Abstract
Using bremsstrahlung produced with 6.6 and 9.7 MeV beams, nuclear resonance fluorescence measurements were made on targets of $^{206,207,208}\mathrm{Pb}$ and $^{209}\mathrm{Bi}$. Ground state transition widths for previously unknown energy levels with widths $\ensuremath{\gtrsim}1$ eV were obtained. An interpretation of several of these levels in terms of a particle-core weak coupling model is suggested.NUCLEAR REACTIONS $^{206,207,208}\mathrm{Pb}$, $^{209}\mathrm{Bi}$$\ensuremath{\gamma},\ensuremath{\gamma}$; resonance fluorescence with 9.7 and 6.6 MeV bremsstrahlung. Levels measured ${E}_{\ensuremath{\gamma}}$, ${I}_{\ensuremath{\gamma}}$ at 125\ifmmode^\circ\else\textdegree\fi{} (lab); deduced $\frac{g\ensuremath{\Gamma}_{0}^{}{}_{}{}^{2}}{\ensuremath{\Gamma}}$.
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