36 research outputs found
A continuous OSL scanning method for analysis of radiation depth dose profiles in bricks
No full textExcitation and emission spectrometry of stimulated luminescence from quartz and feldspars
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The influence of crystal structure on the excitation and emission spectra of OSL in alkali and plagioclase feldspars
No full textInfluence on donor electron energies of the chemical composition of K, Na and Ca aluminosilicates
No full textLuminescence properties of porcelain ceramics relevant to restrospective radiation dosimetry
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Enhancements in luminescence measurement techniques
No full textNew developments in the Risø TL/OSL system includes a software controlled heater fitted underneath the beta source to enable irradiation of samples at an elevated temperature. This allows investigations of competition effects from thermally shallow traps and centres. Significant additional software developments include the facility to vary linearly the stimulation power during stimulation (linearly modulated OSL). The elevated temperature irradiator facility has been further expanded to allow the measurement of radioluminescence (RL) during beta irradiation. This additional facility allows the measurement of TL, OSL and RL in the same software controlled automatic sequence. This paper provides a description of the capabilities of the new combined automatic TL/OSL/RL reader, and illustrates the application of the elevated temperature irradiator facility, and the RL unit. The new measurement facilities have provided preliminary information about possible trap competition during storage, and changes in recombination processes
Optical excitation processes in the near band-edge region of KAlSi<sub>3</sub>O<sub>8</sub> and NaAlSi<sub>3</sub>O<sub>8</sub> feldspar
No full textLuminescence excitation characteristiccs of Ca, Na and K-aluminosilicate (feldspars) in stimulation range 5-40eV: determination of the band-gap energies
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