Sr. Amendolia et al., EXPERIMENTAL-STUDY OF LEC GAAS DETECTORS FOR X-RAY DIGITAL RADIOGRAPHY, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 380(1-2), 1996, pp. 410-413
In previous studies, various semi-insulating LEC GaAs crystals were ir
radiated with photons in the diagnostic energy range (20-100 keV), in
view of a possible application in digital radiography. Solid-state and
irradiation measurements, together with Monte Carlo simulations, have
indicated good candidates for this application among the crystals we
have investigated. In this paper we present results concerning the det
ection characteristics (detection efficiency, charge-collection effici
ency and energy resolution as functions of the bias voltage) of one of
these materials and the images obtained by a pixel detector made on t
he same material and a bump-bonded electronic system.