Parity of Bound Dipole States inPb208

The parities of eleven $J=1\mathrm{}$ levels in ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ were determined by nuclear resonance fluorescence scattering of linearly polarized photons. A new $1^{+}$ level at $E_x=5.846\mathrm{}$ MeV with $\frac{{{\Gamma }_0}^2}{\Gamma }=1.2\mathrm{}\pm 0.4$ eV was found. This level can probably be identified with the theoretically predicted isoscalar $1^{+}$ state in ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$. All other bound dipole states below 7 MeV with $\frac{{{\Gamma }_0}^2}{\Gamma }>1.5\mathrm{}$ eV have negative parity. The $1^{-}$ assignment to the 4.842-MeV level is of special significance because of previous conflicting results about its parity.