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- W2009283606 abstract "Abstract Mechanically and chemically polished samples of GaAs were irradiated with fission neutrons to fluences varying from 2 × 1016 to 1.4 × 1018 neutrons/cm2 and with 1.5 MeV electrons with doses varying from 1017 to 1018 el/cm2. Infrared absorption in irradiated crystals was measured at 300°K and 85°K. In neutron-irradiated samples absorption bands centered at 0.47 eV and at 0.25 eV are observable. It is suggested that the 0.47 eV band is connected with transitions from a level at (Ec −0.5) eV reported earlier from electrical measurements. The absorption coefficient was found to vary linearly with the square of the photon energy over a limited energy range. For electron-irradiated GaAs, the absorption in the band gap had an exponential variation with energy. The possible reasons for such a behaviour are discussed. The absorption spectrum at 85°K in electron-irradiated samples shows the presence of a band at 1.0eV. Isothermal and isochronal annealing behaviour of this absorption band was studied. An analysis of data suggests that the recovery obeys first order kinetics with an activation energy of 0.88±0.07 eV." @default.
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- W2009283606 title "Infrared absorption studies in neutron and electron-irradiated GaAs" @default.
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- W2009283606 doi "https://doi.org/10.1080/00337577108231078" @default.
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