Spectroscopic performance of semi-insulating GaAs detectors for digital radiography

Authors
Bertolucci, E Conti, M Mettivier, G Russo, P Cola, A Quaranta, F Vasanelli, L Bisogni, MG Bottigli, U Fantacci, ME Stefanini, A
Citation
E. Bertolucci et al., Spectroscopic performance of semi-insulating GaAs detectors for digital radiography, NUCL INST A, 422(1-3), 1999, pp. 247-251
Citations number
3
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
422
Issue
1-3
Year of publication
1999
Pages
247 - 251
Database
ISI
SICI code
0168-9002(19990211)422:1-3<247:SPOSGD>2.0.ZU;2-4
Abstract
We studied pixel radiation detectors for X-ray radiography based on semi-in sulating GaAs: in particular, we investigated both annealed and non-anneale d contact deposition techniques for the ohmic contact and both ring-guarded and non-guarded Schottky contact, in order to reduce the leakage current a nd to increase the maximum applied electric field. Spectroscopic characteri zation with a 60 keV 241 Am source has been performed. Among these differen t detectors, the CCE can reach 99 +/- 6%, while the energy resolution Delta E/E can go down to 4.1 +/- 0.2%. (C) 1999 Elsevier Science B.V. All rights reserved.