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Helmholtz Prize for 2001 awarded

The winners of the Helmholtz Prize for 2001 with Ruprecht von Siemens, Treasurer of the Helmholtz-Fonds (in the centre): Stefan Hell, Jochen Bonn, Christian Weinheimer and Thomas Klar (from the left).

This year's Helmholtz Prize, the most important prize awarded in the field of metrology, acknowledges two topics: Accomplishments in research of neutrinos and the technology of microscopy. The prize was presented on June 25 within the framework of a festive event in PTB's lecture hall. It was shared in equal proportions of 20 000 DM by Dr. Jochen Bonn and Dr. Christian Weinheimer, Institute of Physics of Johannes Gutenberg University in Mainz, for their work "High-precision measurement of the tritium beta spectrum near its endpoint and upper limit on the neutrino mass", and Dr. Stefan W. Hell and Dr. Thomas A. Klar, Max Planck Institute of Biophysical Chemistry, Göttingen, for their work "Durchbruch der Auflösungsgrenze in der Fernfeld-Fluoreszenzmikroskopie (STED-Mikroskopie)" ("Breaking through the limits of resolution in far-field fluorescence microscopy").