Göttingen 2025 – wissenschaftliches Programm
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ST: Fachverband Strahlen- und Medizinphysik
ST 3: Radiation Monitoring and Dosimetry
ST 3.1: Vortrag
Mittwoch, 2. April 2025, 11:00–11:15, ZHG003
Dosimetry for sub-relativistic electrons and their potential use in radiotherapy — •Julian Freier1, Leon Brückner1, Stefanie Kraus1, Julian Litzel1, Bastian Löhrl1, Christoph Bert2, Luitpold Distel2, and Peter Hommelhoff1,3 — 1Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen — 2Department Strahlenbiologie, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen — 3Department Physik, Ludwig-Maximilians-Universität München (LMU), 80799 München
The acceleration of electrons based on nanophotonic structures may lead to dice-sized accelerators, emitting electrons with energies in the sub-MeV to MeV regime for potential use in radiotherapy [1,2,3]. Leveraging electron energies in the keV range and their proposed high biological efficiency [4], we present a method for calibrating EBT3 GafChromic films for low-energy electrons to be used in future experiments in biology. The used setup employs an ultrafast electron source, utilizing photoemission from a sharp nano-tip array that enables irradiation of cells with electrons up to 50keV for comparison with x-ray samples. This method allows to estimate the biological impact of such electron radiation on cells. References [1] England, et al., Rev.Mod.Phys.86.4 1337 (2014)[2] Chlouba, Shiloh, Kraus, Brückner, et al. Nature 622, 476 480 (2023) [3] Broaddus, et al. PRL 132, 085001 (2024) [4] Tye, et al, R.Soc. Open Sci.11240898 (2024)
Keywords: Dosimetry; Chip-based accelerator; Low-energy electron radiation; Gafchromic films; Radiotherapy