In this work we propose a gamma detector based on Silicon Drift Detectors to readout a 1″×1″ LaBr3:Ce scintillator for gamma-ray spectroscopy and imaging application. Position sensitivity could be useful in nuclear physics research to limit the worsening effect of Doppler broadening in gamma-ray spectroscopy at relativistic velocities. The main difficulty in determining the position of the gamma-ray interaction in the crystal is associated to the thickness/diameter ratio of the crystal (in our case 1-1) and the use of reflectors on all lateral and top sides of the crystal. This last choice enhances energy resolution, but makes imaging capability more challenging because light is spread over all photodetectors. Preliminary results show that the camera is able to detect shifts in the measured signals, when a 137Cs (662 keV) source is moved with steps of 5 mm. A modified version of the centroid method is finally implemented to evaluate the imaging capability of the system.

Investigation of imaging and spectroscopy performances of a 1″×1″ LaBr3:Ce scintillator readout by Silicon Drift Detectors for nuclear physics measurements / P. Busca, A.D. Butt, C. Fiorini, A. Marone, M. Occhipinti, R. Peloso, R. Quaglia, F. Camera, A. Giaz, B. Million, G. Giacomini, C. Piemonte - In: IEEE Nuclear Science Symposium Conference Record[s.l] : Institute of Electrical and Electronics Engineers Inc., 2013. - ISBN 9781479905348. - pp. 1-4 (( convegno 2013 60th IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013 tenutosi a Seoul, kor nel 2013 [10.1109/NSSMIC.2013.6829807].

Investigation of imaging and spectroscopy performances of a 1″×1″ LaBr3:Ce scintillator readout by Silicon Drift Detectors for nuclear physics measurements

F. Camera
;
A. Giaz
;
2013

Abstract

In this work we propose a gamma detector based on Silicon Drift Detectors to readout a 1″×1″ LaBr3:Ce scintillator for gamma-ray spectroscopy and imaging application. Position sensitivity could be useful in nuclear physics research to limit the worsening effect of Doppler broadening in gamma-ray spectroscopy at relativistic velocities. The main difficulty in determining the position of the gamma-ray interaction in the crystal is associated to the thickness/diameter ratio of the crystal (in our case 1-1) and the use of reflectors on all lateral and top sides of the crystal. This last choice enhances energy resolution, but makes imaging capability more challenging because light is spread over all photodetectors. Preliminary results show that the camera is able to detect shifts in the measured signals, when a 137Cs (662 keV) source is moved with steps of 5 mm. A modified version of the centroid method is finally implemented to evaluate the imaging capability of the system.
Radiation; Nuclear and High Energy Physics; Radiology, Nuclear Medicine and Imaging
Settore FIS/04 - Fisica Nucleare e Subnucleare
and Electronics Engineers (IEEE NPSS)
Society of the Institute of Electrical
The Nuclear and Plasma Sciences
Book Part (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/248398
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