Pulsed optically stimulated luminescence from α-Al2O3:C using green light emitting diodes

Optically Stimulated Luminescence (OSL) from alpha-Al2O3:C was investigated using green light emitting diodes (LED) for excitation. Time resolved luminescence characteristics of the samples were studied by pulsing the LEDs during the readout. The effects of excitation light intensity, pulse width and readout temperature on the OSL signal were investigated. The radiation dose response of the dosimeters with above mentioned parameters was also evaluated for the applicability to radiation dosimetry.
Radiation Measurements


Optically stimulated luminescence from quartz measured using the linear modulation technique
Bulur, Enver; Murray, A.S. (2000-12-15)
The optically stimulated luminescence (OSL) from heated natural quartz has been investigated using the linear modulation technique (LMT), in which the excitation light intensity is increased linearly during stimulation. In contrast to conventional stimulation, which usually produces a monotonically decreasing signal, linearly increasing the stimulation power gives peaks in the signal as a function of time. In cases where the OSL signal contains more than one component, the linear increase in power of the st...
Time-resolved optically stimulated luminescence (osl) studies on samples containing quartz and feldspar
Yeltik, Aydan; Bulur, Enver; Department of Physics (2009)
Time Resolved OSL (TR-OSL) is a technique to record the luminescence decay curve data after a brief stimulation pulse and can possibly be used for the separation of luminescence signals from quartz and feldspars. In this study luminescence emission from quartz and feldspar samples was investigated. TR-OSL signals of these samples were studied for the variations with preheating and annealing temperature, stimulation pulse width and total stimulation time, optical bleaching, radiation dose and measurement tem...
LM-OSL signals from some insulators: An analysis of the dependency of the detrapping probability on stimulation light intensity
Bulur, Enver; Murray, A.S. (2001-01-01)
Optically stimulated luminescence (OSL) signals from various insulators including quartz, Al2O3 : C, BeO and NaCl have been studied using the linear modulation OSL (LM-OSL) technique. LM-OSL is based on the linear increase of the stimulation light power from zero to a maximum during the measurement. The resultant OSL curve initially increases and then decays after reaching a maximum, The analysis of LM-OSL data usually assumes a linear relationship between the detrapping rate and the stimulation light inten...
Use of the LM-OSL technique for the detection of partial bleaching in quartz
Agersnap Larsen, N.; Bulur, Enver; Bøtter-Jensen, L.; McKeever, S.W.S. (2000-12-15)
We present a study of the sensitivity to light (ease-of-bleaching) of the trapped charge in sedimentary quartz grains using an optically stimulated luminescence (OSL) technique in which the intensity of the stimulation light is linearly increased during the measurement period. The technique is known as linear modulation OSL (LM-OSL). In controlled laboratory conditions, this technique has been employed to study the ease-of-bleaching of the trapped charge in quartz by comparing the OSL curves of quartz aliqu...
Energy-saving quality road lighting with colloidal quantum dot nanophosphors
Erdem, Talha; Keleştemur, Yusuf; SORAN ERDEM, ZELİHA; Ji, Yun; Demir, Hilmi Volkan (2014-12-01)
Here the first photometric study of road-lighting white light-emitting diodes (WLEDs) integrated with semiconductor colloidal quantum dots (QDs) is reported enabling higher luminance than conventional light sources, specifically in mesopic vision regimes essential to street lighting. Investigating over 100 million designs uncovers that quality road-lighting QD-WLEDs, with a color quality scale and color rendering index >= 85, enables 13-35% higher mesopic luminance than the sources commonly used in street l...
Citation Formats
E. Bulur, “Pulsed optically stimulated luminescence from α-Al2O3:C using green light emitting diodes,” Radiation Measurements, pp. 479–488, 1997, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41396.