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ST: Fachverband Strahlen- und Medizinphysik

ST 1: Radiation Therapy

ST 1.4: Vortrag

Montag, 15. März 2021, 16:45–17:00, STa

Consolidation and absolute measurement of the ¹²C(p,pn)¹¹C-cross section for particle therapy — •Claus Maximilian Bäcker^1,2,3,4, Wihan Adi⁵, Christian Bäumer^2,3,4,6, Marcel Gerhardt¹, Felix Horst^7,8, Kevin Kröninger¹, Christoph Schuy⁸, Beate Timmermann^2,3,4,9, Nico Verbeek^2,3,4, Jens Weingarten¹, and Jörg Wulff^2,3,4,7 — 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 — ⁶TU Dortmund, Fakultät Physik, 44227 Dortmund — ⁷Institut für Medizinische Physik und Strahlenschutz, Technische Hochschule Mittelhessen, 35390 Gießen — ⁸GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt — ⁹Universitätsklinikum 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 persists in the recent measurements from Essen / Dortmund and Giessen / Darmstadt. With comparative measurements, the reason for this systematic difference is investigated and the new reference cross section (68±2) mbarn of the ¹²C(p,pn)¹¹C-reaction is evaluated at 100 MeV proton beam energy. The results are presented in this talk.