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Detectors for high resolution gamma-ray imaging based on a single CsI(Tl) scintillator coupled to an array of silicon drift detectors

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7 Author(s)
Fiorini, C. ; Dipartimento di Ingegneria Nucl., Politecnico di Milano, Italy ; Longoni, A. ; Perotti, F. ; Labanti, C.
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Silicon Drift Detectors (SDDs) coupled to scintillators have been recently employed successfully in gamma-ray detection. The low value of output capacitance of a SDD allows to reach a lower electronics noise with respect to a conventional silicon photodiode. Detectors based on array of SDDs are of particular interest for gamma-ray imaging. A first prototype conceived for high-resolution imaging is based on a monolithic array of small SDDs (5 mm2 each unit) with on-chip JFET. The first imaging results obtained with a seven elements array are here reported. For the realization of gamma detectors of larger active areas, SDDs of 30 mm2 of area with external JFET, to be assembled in arrays have been produced. We present the experimental results obtained in the characterization of a single CsI(Tl)-SDD unit

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Nuclear Science Symposium Conference Record, 2000 IEEE  (Volume:1 )

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