Experimental study of proton and neutron spin-flip contributions to the electroexcitation of the J=1 state at Ex=5.846 MeV in Pb

The momentum transfer dependence (q=0.20−0.59 fm⁻¹) of the recently discovered M1 transition from the J^π=1⁺ state at E_x=5.846 MeV to the ground state of ²⁰⁸Pb has been studied with high-resolution inelastic electron scattering. The experimental data are compared to results of RPA calculations which include tensor correlations. The influence of these correlations and of the interference of proton and neutron contributions on the M1 transition will be discussed.