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Response of 4H-SiC Detectors to Ionizing Particles

Bernat, Robert; Capan, Ivana; Bakrač, Luka; Brodar, Tomislav; Makino, Takahiro; Ohshima, Takeshi; Pastuović, Željko; Sarbutt, Adam (2021) Response of 4H-SiC Detectors to Ionizing Particles. Crystals, 11 (1). ISSN 2073-4352

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We report the response of newly designed 4H-SiC Schottky barrier diode (SBD) detector prototype to alpha and gamma radiation. We studied detectors of three different active area sizes (1 × 1, 2 × 2 and 3 × 3 mm2), while all detectors had the same 4H-SiC epi-layer thickness of approximately µm, sufficient to stop alpha particles up to 6.8 MeV, which have been used in this study. The detector response to the various alpha emitters in the 3.27 MeV to 8.79 MeV energy range clearly demonstrates the excellent linear response to alpha emissions of the detectors with the increasing active area. The detector response in gamma radiation field of Co-60 and Cs-137 sources showed a linear response to air kerma and to different air kerma rates as well, up to 4.49 Gy/h. The detector response is not in saturation for the dose rates lower than 15.3 mGy/min and that its measuring range for gamma radiation with energies of 662 keV, 1.17 MeV and 1.33 MeV is from 0.5 mGy/h–917 mGy/h. No changes to electrical properties of pristine and tested 4H-SiC SBD detectors, supported by a negligible change in carbon vacancy defect density and no creation of other deep levels, demonstrates the radiation hardness of these 4H-SiC detectors.

Item Type: Article
Uncontrolled Keywords: silicon carbide ; radiation detector ; radiation response ; alpha particles ; gamma radiation
Subjects: NATURAL SCIENCES > Physics
Divisions: Administration
Division of Materials Physics
Project titleProject leaderProject codeProject type
Potpora vrhunskim istraživanjima Centra izvrsnosti za napredne materijale i senzore-Mile Ivanda; Milko Jakšić; Mario Stipčević; Marko KraljKK.
Expanding Potential in Particle and Radiation Detectors, Sensors and Electronics in Croatia-PaRaDeSECNeven Soić669014EK
Depositing User: Ivana Capan
Date Deposited: 18 Jan 2021 14:31
DOI: 10.3390/cryst11010010

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