DYNAMICAL SPIN POLARIZATION OF PHOTOELECTRONS EMITTED FROM THE XE 5P SUBSHELL BETWEEN 50 EV AND 150 EV B. Zimmermann*, G. Snell*+, B. Schmidtke+, M. Drescher+, J. Viefhaus*, N. A. Cherepkov#, N. Müller+, U. Heinzmann+, and U. Becker* *Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany, +Universität Bielefeld, Fakultät für Physik, 33501 Bielefeld, Germany, #State University of Aerospace Instrumentation, 190000 St. Petersburg, Russia The dynamical spin polarization of photoelectrons emitted during photoionization of the Xe 5p subshell was calculated and measured over an extended energy range from 50 eV to above 150 eV. The measurements support the theoretical prediction at a strong modulation of the dynamical spin polarization in this energy intervall where the different theoretical approaches give nearly identical results. Details of the experiment