Abstract
Experimental data on elastic scattering of photons in the energy range from 10 to 100 MeV for the nucleus 208Pb are presented. These new data along with some previously published data on photoabsorption are tentatively analysed in the framework of a consistent description. Besides a value for the summed total strength, the partial strengths of some multipoles were obtained. An electric quadrupole resonance was found to be located at 24.3 MeV with a strength of 1.4 isovector sums. An experimental value was deduced for a parameter which can be regarded as a half-density radius for the spatial interaction strength density distribution, including exchange currents, in a nucleus. This radius parameter was found to be 4.9 ± 0.15 fm, considerably smaller than the electrical charge density distributions radius (6.6 fm), as obtained by elastic electron scattering.
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