Author/Authors :
Zat’ko، نويسنده , , Bohum?r and Dubeck?، نويسنده , , Franti?ek and ??epko، نويسنده , , Pavol and Grybo?، نويسنده , , Pawe? and Mudro?، نويسنده , , Jan and Maj، نويسنده , , Piotr and Szczygie?، نويسنده , , Robert and Frollo، نويسنده , , Ivan، نويسنده ,
Abstract :
Detectors based on semi-insulating (SI) GaAs show high detection efficiency and satisfactory energy resolution for modern X-ray digital imaging applications. This work deals with the performance of SI GaAs-based detectors coupled by wire bonding to the input of multichannel readout chip DX64 (technology CMOS 0.35 μm). Detectors have circular Ti/Pt/Au multilayer Schottky blocking contacts with different diameters (0.75, 0.50, 0.30 and 0.20 mm). First results of operation of the used readout system in the single-photon counting regime are given.
Keywords :
GaAS , Multichannel readout chip , X-ray and ?-ray detection , semi-insulating
