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- W2034187186 abstract "Current-voltage (I-V) characteristics of radiation detector structures based on semi-insulating (SI) GaAs obtained with new types of metallizations used to form quasi-ohmic contacts are described. Three different metals (In, Gd and Mg), having lower work function in comparison with the standard AuGeNi eutectic alloy, were used. The new contacts form a blocking barrier for holes (minority carriers in SI GaAs). Such contacts, which could effectively replace standard alloyed N <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>+</sup> ohmic contact, show an unusual electrical charge transport as deduced from the measured I-V characteristics. Pulse-height spectra of <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>241</sup> Am and <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>57</sup> Co radionuclide sources detected by the structures demonstrating performance ofthe detectors are also reported." @default.
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- W2034187186 date "2008-10-01" @default.
- W2034187186 modified "2023-10-18" @default.
- W2034187186 title "Study of bulk semi-insulating GaAs radiation detectors: Role of ohmic contact metallization in electrical charge transport and detection performance" @default.
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- W2034187186 doi "https://doi.org/10.1109/asdam.2008.4743341" @default.
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