Title :
Performances of a Silicon drift chamber as fast scintillator photodetector for γ-ray spectroscopy
Author :
Fiorini, C. ; Longoni, A. ; Perotti, F. ; Labanti, C. ; Rossi, E. ; Lechner, P. ; Strüder, L.
Author_Institution :
Dipt. di Elettronica e Inf., Politecnico di Milano, Italy
Abstract :
The performances of a Si drift chamber (SDC), having a diameter of 3 mm, as scintillation light photodetector have been experimentally evaluated on a prototype of γ-ray detector employing a GSO crystal of similar cross-section. This detector presents a minimum energy threshold of about 50 keV at room temperature or 25 keV at 0°C. The measured energy resolution at room temperature is 22.65% and 8.73% FWHM at 122 keV and 662 keV respectively. These performances were obtained by using a shaping time of 0.5 μs, which allows to operate at a high γ-ray interaction rate. The effect of the SDC drift-time on the detector gain has been also evaluated
Keywords :
gamma-ray detection; gamma-ray spectroscopy; silicon radiation detectors; solid scintillation detectors; γ-ray detector; γ-ray spectroscopy; 0.5 mus; 25 keV; 273 K; 293 K; 3 mm; 50 keV; GSO; Si; Si drift chamber; drift-time; energy resolution; fast scintillator photodetector; minimum energy threshold; room temperature; shaping time; Energy measurement; Energy resolution; Gamma ray detection; Gamma ray detectors; Performance evaluation; Photodetectors; Prototypes; Silicon; Solid scintillation detectors; Temperature;
Conference_Titel :
Nuclear Science Symposium, 1997. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
0-7803-4258-5
DOI :
10.1109/NSSMIC.1997.672572
