Abstract
GaAs Schottky barrier detectors for α particle spectrometry have been tested. Detectors had an input window area of 80 mm2 and a working barrier layer thickness of 40–50 μm. The energy resolution (FWHM) measured on 5.499 MeV α line of 238Pu source amounted to 17.5 keV at a generator peak width of 7.8 keV. In the measurements on a 226Ra source, detectors showed linear response and nearly 100% charge collection efficiency at reverse bias above 65 V for all energies of α particles emitted from the source. Tests for thermal stability showed that the proposed detectors can be used in alpha-spectrometry of radionuclides at temperatures up to 120°C.
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Original Russian Text © A.V. Chernykh, S.V. Chernykh, S.I. Didenko, N. Burtebaev, Maulen Nasurlla, Marzhan Nasurlla, G.I. Britvich, A.P. Chubenko, F.M. Baryshnikov, E.V. Sleptsov, 2018, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2018, Vol. 44, No. 20, pp. 87–94.
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Chernykh, A.V., Chernykh, S.V., Didenko, S.I. et al. GaAs Schottky Barrier Detectors for Alpha-Particle Spectrometry at Temperatures up to 120°C. Tech. Phys. Lett. 44, 942–945 (2018). https://doi.org/10.1134/S106378501810019X
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DOI: https://doi.org/10.1134/S106378501810019X