Würzburg 2018 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 8: Poster Session

EP 8.2: Poster

Wednesday, March 21, 2018, 17:00–18:30, BSZ - Pabel HS

Investigation of a Boron-doped scintillation counter — •C. Wallmann, S. Böttcher, S. Burmeister, B. Heber, and R. Wimmer-Schweingruber — Christian-Albrechts-Universität zu Kiel, Germany

Neutron detection and energy measurements in the atmosphere are a complex task. Bonner spheres as deployed on the Zugspitze are used to determine the neutron spectra. In this work an alternative using a boron-doped scintillator is investigated. The plastic scintillator used consists to one half of Hydrogen and has therefore a large cross section for elastic scattering of neutrons. The proton is accelerated and will deposit its energy in the scintillator. The boron captures the slow neutron and decays and an alpha particle is emitted that deposits a characteristic energy of 2.34 MeV in the scintillator. The time delay between the two processes is approximately 2.7µs. In order to measure incoming neutrons we trigger on signals for that the second pulse corresponds to the capture line. The first pulse then carries information about the incoming energy of the neutron.