SMuK 2023 – scientific programme

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ST: Fachverband Strahlen- und Medizinphysik

ST 5: Physics and Technology for Radiation Detection

ST 5.4: Talk

Wednesday, March 22, 2023, 16:35–16:50, ZEU/0146

Neutron dosimetry with diamont sensors — •Jennifer Schlüß, Kevin Kröninger, Jens Weingarten und Alina Landmann — Technische Universität Dortmund, Dortmund, Germany

Neutron dosimetry is becoming increasingly relevant in proton therapy. From to the neutrons released, conclusions can be drawn about the deposited energy in the body. However, neutron dosimetry is complicated because neutrons are electrically neutral particles and cannot ionize directly. Neutrons must therefore be converted to charged particles before they can be detected. One way to convert neutrons is with the help of diamond sensors. The natural carbon isotope ¹²C captures fast neutrons (E_kin > 5 MeV). This produces alpha particles which can be detected in the diamond detector itself. To make the detector more sensitive to thermal neutrons, an attempt is made to coat the detector with a converter material such as ⁶LiF. The simulation tool Geant4 will be used to test carbon capture reactions as a tool for further detector development. A multi-spectrum will then be used to perform neutron dosimetry with the goal of implementing a multi-spectrum detector for neutron dosimetry. To characterize the detection of fast neutrons, the diamond sensor will be tested in a later step with a simple readout in a neutron field.