Giant M1 resonance in Pb.

Highly polarized tagged photons were used to measure the distribution of M1 transition strength in /sup 206/Pb at excitations between 6.7 and 8.1 MeV. The observed B(up-arrowM1) of about 19..mu../sub 0//sup 2/ can account for most of the isovector M1 strength that is expected in the Pb nucleus. This result in /sup 206/Pb is compared with the current experimental situation in /sup 208/Pb. The discrepancy between predicted and observed M1 strengths in /sup 208/Pb can probably be attributed to local fragmentation of the strength into states that are too weak to have yet all been identified.