Author/Authors :
Bertolucci، نويسنده , , E. and Bisogni، نويسنده , , M.G. and Bottigli، نويسنده , , U. and Conti، نويسنده , , M. and Cola، نويسنده , , A. and Fantacci، نويسنده , , M.E. and Maestro، نويسنده , , P. and Mettivier، نويسنده , , G. and Quaranta، نويسنده , , F. and Rosso، نويسنده , , V. M. Russo، نويسنده , , P. and Stefanini، نويسنده , , A. and Vasanelli، نويسنده , , L.، نويسنده ,
Abstract :
This collaboration has already obtained encouraging results about the performance of 200 and 600 μm thick semi-insulating GaAs detectors, in terms of charge collection efficiency (c.c.e.), detection efficiency and imaging capabilities, to be used as single photon counting detectors with photons in the radiographic energy range. The possible use of such detectors in nuclear medicine implies detection of more energetic photons, up to the 140 keV of the 99mTc source; thus efficient detectors must be thicker than those previously studied. In this paper, we present the results of the investigation of electrical and detection properties (spectra, c.c.e., energy resolution) of a series of detectors, whose thickness ranges from 200 to 1000 μm, when irradiated with radioactive sources over the energy range used in nuclear medicine.
