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Influence of damage by neutrons introduced in semi-insulating GaAs detectors is studied by current-voltage measurement and Photo-Induced Current Transient Spectroscopy (PICTS). Significant rise of the reverse current is observed at neutron fluencies exceeding 1013 ncm-2. The PICTS is used for evaluation of deep-level states in detector structures prior and after neutron bombardment. Formation of a...
This work deals with the performance of thin semi-insulating GaAs-based detectors of ionizing radiation DC-coupled to the low noise readout electronics. Fabricated detector have square shape Ti/Pt/Au Schottky blocking contact with dimension of 0.5 mm and full area AuGeNi eutectic alloy quasi-ohmic contact on the opposite site. The current-voltage characteristic and 241Am pulse-height spectra of the...
Results are presented of an experimental study of detectors based on LEC SI GaAs with various top Schottky contact arrangements. The study is concentrated on an improvement of relative detection efficiency, as an important detection property of detectors considered for application in digital radiography. The current–voltage and pulse height spectra measurements at 295K using 241 Am and ...
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