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Detectors of Gamma Rays and Alpha Particles Based on Ta-Doped InP Converted to the Semi-Insulating State by Annealing
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SYSNO ASEP 0341437 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Detectors of Gamma Rays and Alpha Particles Based on Ta-Doped InP Converted to the Semi-Insulating State by Annealing Author(s) Žďánský, Karel (URE-Y)
Gorodynskyy, Vladyslav (URE-Y)
Pekárek, Ladislav (FZU-D)Source Title IEEE Transactions on Nuclear Science. - : Institute of Electrical and Electronics Engineers - ISSN 0018-9499
Roč. 56, č. 5 (2009), s. 2997-3001Number of pages 5 s. Language eng - English Country US - United States Keywords radiation detection ; semiconductor doping ; crystal growth Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects KAN400670651 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) KAN401220801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) IBS2067354 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20670512 - URE-Y (2005-2011) AV0Z10100520 - FZU-D (2005-2011) UT WOS 000271100600031 DOI 10.1109/TNS.2009.2027902 Annotation InP crystals were synthesized with a Ta admixture grown by the Czochralski technique, and wafers cut from the grown crystals were converted to the SI state by high-temperature annealing. The good detection performance of such material-based detectors has been tested with alpha-particles from a Am-241 source (5.48 MeV). The charge collection efficiency (CCE) of 84% and relative energy resolution at full width at half maximum (FWHM) of 5% were obtained at room temperature 295 K (RT). Low-energy gamma-photons of 122 keV from a Co-57 source and gamma-photons from a Cs-137 source were detected at 242 K, 272 K, and 295 K, respectively. The values of CCE 88% and FWHM 16 keV of 122 keV photons and CCE 87% and FWHM 48 keV of gamma-photons of 662 keV were obtained at reduced temperatures. A pulse-height spectrum of 662 keV gamma-photons registered at room temperature is also shown in this work. Workplace Institute of Radio Engineering and Electronics Contact Petr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488 Year of Publishing 2010
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