GaAs detectors for hard X-ray astronomy

Particle detectors fabricated from bulk semi-insulating (SI) GaAs of 4 different suppliers are investigated. I-V, C-V characteristics, material transport parameters as well as inhomogeneities are studied and correlated with detector performances. It was observed that the charge collection efficiency...

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Bibliographic Details
Published in:Nuclear physics. Section B, Proceedings supplement Proceedings supplement, 1997-03, Vol.54 (3), p.368-371
Main Authors: Dubecký, F., Krempaský, M., Pelfer, P.G., Darmo, J., Pikna, M., Šatka, A., Sekácová, M., Rucek, M.
Format: Article
Language:English
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Summary:Particle detectors fabricated from bulk semi-insulating (SI) GaAs of 4 different suppliers are investigated. I-V, C-V characteristics, material transport parameters as well as inhomogeneities are studied and correlated with detector performances. It was observed that the charge collection efficiency and the energy resolution of detectors tested by 5.48 MeV α-particles and 122 keV X-rays is strongly affected by physical properties of the base material. It is concluded that detectors fabricated from the graded bulk SI GaAs material are suitable for application in hard X-ray astronomy.
ISSN:0920-5632
1873-3832
DOI:10.1016/S0920-5632(97)00136-9