SPIN DEPENDENCE IS SCATTERING OF 14-MEV ELECTRONS FROM LEAD NUCLEI

We studied polarization effects in the elastic scattering of 14 MeV el ectrons from lead nuclei. The left-right asymmetry was measured at two scattering angles as a function of the target thickness using a polar ized (P congruent-to 0.3) monochromatic electron beam extracted after the first stage of the Mainz Microtron. The measured analyzing powers are in good agreement with Mott scattering theory. Effects of finite s ize of the lead nuclei are perceivable. The depolarization in thick sc attering foils was measured for the first time for electrons in energy range nonaccessible with beta-decay sources.