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ST: Fachverband Strahlen- und Medizinphysik
ST 7: Radiation Therapy and Detector Physics
ST 7.2: Talk
Thursday, April 2, 2020, 14:15–14:30, H-HS II
Comparative measurement of 12C(p,pn)11C-cross section for particle therapy — •Claus Maximilian Bäcker1,2,3,4, Wihan Adi5, Christian Bäumer2,3,4, Marcel Gerhardt1, Felix Horst6,7, Kevin Kröninger1, Christoph Schuy7, Beate Timmermann2,3,4,8, Nico Verbeek2,3,4, Jens Weingarten1, and Jörg Wulff2,3,4,6 — 1TU Dortmund, Experimentelle Physik IV, 44227 Dortmund — 2Westdeutsches Protonentherapiezentrum Essen, 45122 Essen — 3Westdeutsches Tumorzentrum, 45122 Essen — 4Universitätsklinikum Essen, 45122 Essen — 5II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Giessen — 6Institut für Medizinische Physik und Strahlenschutz, Technische Hochschule Mittelhessen, 35390 Gießen — 7GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt — 8Universitätsklinikum Essen, Klinik für Partikeltherapie, 45122 Essen
For PET imaging as a range verification method in proton therapy, an accurate knowledge of the activation cross sections is required to determine the expected β+ activity distribution.
For the 12C(p,pn)11C-reaction, the measured cross sections accumulate around two excitation functions, which are about 15% apart. This difference exists also in the recent measurements from Essen / Dortmund and Giessen / Darmstadt. By comparison of both experimental studies and cross check of parameters, like irradiation technique or target size and material, the reason for the difference is investigated and several parameters have already been successfully excluded as a reason for this difference. In this talk, the current results will be presented.