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- W2034221315 abstract "Abstract It is well known that X-rays cause luminescence in quartz. This luminescence consists of two broad bands at 2.5 and 3.3 eV. After X-ray excitation natural quartz has an afterglow. The duration of this afterglow and the intensity of the emitted light show a strong dependence on the temperature of the sample. While the intensity is not so reproducible, the duration of the afterglow has a clear temperature- dependence and can be connected with two electron-traps in the customary band model — one with a depth of 8 meV and the other with 260 meV — using an Arrhenius-plot. If the quartz crystal has been doped with silver by electro-diffusion, additional luminescence bands at 2.2 eV and around 5 eV occurs. The latter broad luminescence band consists of a dominant part with a decay-time of 40 μsec at 4.8 eV and a weak band at 5.4 eV without afterglow. In contrast to natural quartz, the luminescence intensity as well as the decay-time in the silver-doped sample is independent of the temperature in the range 77–300 K. This constant afterglow is associated with partially forbidden transitions in the silver dopant and energy-transfer to the luminescence centres. In the suggested luminescence model, the observed luminescence bands are connected with an energy transition in the silver." @default.
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- W2034221315 date "1984-01-01" @default.
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- W2034221315 title "The decay of luminescence in natural and silver-doped quartz after X-ray excitation" @default.
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- W2034221315 doi "https://doi.org/10.1016/0022-3697(84)90102-1" @default.
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