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EP: Fachverband Extraterrestrische Physik

EP 4: Poster Session

EP 4.22: Poster

Dienstag, 26. Februar 2013, 11:15–12:45, Poster OG

Characterisation of a LSO scintillation crystal for space applications — •Robert Elftmann, Jan Grunau, Shrinivasrao Kulkarni, César Martin, and Robert Wimmer-Schweingruber — IEAP Christian-Albrechts-Universität, Kiel, Deutschland

Inorganic scintillation crystals coupled with semiconductor detectors are often used in space applications as gamma ray detectors or high energy particle calorimeters. Currently BGO (Bi₄Ge₃O₁₂) is widely used for this purpose because of its high stopping power, the non hygroscopy and its ruggedness, which is favorable in space applications. Cerium doped LSO (Lu₂SiO₅) offers the same benefits with higher light output capabilites and a shorter decay time. In this work a cerium doped LSO scintillation crystal coupled with a photo diode is investigated. The light yield and resolution studies for two different radioactive sources, ²⁰⁷Bi and ⁶⁰Co, are presented. To increase the light collection and consequently the energy resolution, scintillation crystals are wrapped in highly reflective material. The increase in light collection depending on the amount of layers for the LSO crystal along with investigations of quenching effects with alpha particles and the background spectrum, which arises from radioactive cerium isotopes, are also included in this work.