Bonn 2020 – scientific programme
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ST: Fachverband Strahlen- und Medizinphysik
ST 1: Radiation monitoring and dosimetry I
ST 1.3: Talk
Tuesday, March 31, 2020, 11:30–11:45, H-HS II
The prospects of the evaluation of the high-LET peaks of thermoluminescence glowcurves in the context of neutron dosimetry — •Myriam Heiny1, Ajvar Kern3, Kevin Kröninger1, Jörg Walbersloh2, and Jens Weingarten1 — 1TU Dortmund University, Dortmund, Germany — 2Materialprüfungsamt NRW, Dortmund, Germany — 3West German Proton Therapy Centre Essen, Essen, Germany
The individual monitoring service at the Materialprüfungsamt Nordrhein-Westfalen and the TU Dortmund are developing the compact dosemeter system TL-DOS based on thin-layer thermoluminescence detectors as well as an associated glow curve analysis tool. This work focuses on the TL-DOS neutron dosemeter system.
The system consists of LiF:Mg,Ti detectors, an albedo badge and a readout device. In order to gain more information about the irradiation like the particle type, the detectors used are measured at 380°C to include the high-LET peaks. The resulting glow curve is deconvoluted into its individual peaks to analyze them. After a design specification was defined, the neutron dosemeter was characterized in different photon and neutron fields as well as in workplace fields. Additionally, the system was irradiated with mixed fields like alpha+photon and neutron+photon fields to analyzed the high LET peaks of a glow curve seperately. The analysis provides additional information about the radiation field, for example the particle type, the composition of mixed fields and the irradiation energy. I present the current development status and test results as well as future prospects.