Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster - Instrumentation I

HK 52.7: Poster

Mittwoch, 6. März 2013, 16:45–19:00, HSZ 2.OG

Characterization of a LaBr₃ crystal with multi-anode PMT readout^* — •Saad Aldawood^{1, 2}, Christian Lang¹, Dieter Habs^{1, 3}, Ludwig Maier⁴, Katia Parodi¹, and Peter G. Thirolf¹ — ¹LMU München — ²King Saud University, Riyadh, Saudi Arabia — ³MPI f. Quantenoptik, Garching — ⁴TU München

A Compton camera is presently under construction in Garching, aiming to allow for monitoring the ion-beam range and activity distribution from ion-beam irradiations of bio-medical samples via position-resolved prompt γ-ray detection. The Compton camera consists of a stack of six double-sided Si-strip detectors (50 x 50 mm², 0.5 mm thick, pitch 390 µm) acting as scatterers, while the absorber is formed by a LaBr₃ scintillator crystal (50 x 50 x 30 mm³), read out by a multi-anode PMT. Results from characterization measurements will be presented, covering energy, time, and spatial resolution. In order to characterize the position resolution, a strong and collimated ¹³⁷Cs source (662 keV) was used to scan the 8 x 8 PMT pixel structure of the crystal.

^* Supported by the DFG Cluster of Excellence, MAP (Munich-centre for Advanced Photonics), King Saud University(Saudi Arabia).