Intercomparison study of sensitivities from commercial OSL readers and a newly developed OSL reader

In this study, we compared the sensitivities of a newly designed OSL system with two commercial systems, performing OSL readouts of Al2O3:C irradiated with doses ranging from mGy to a few Gy. It is our first prototype, and we used a cluster of three blue LEDs (5 W each and approximately wavelength 450 nm) for the optical stimulation in the modes continuous wave (CW-OSL) and pulsed (POSL). The detection window used a bandpass filter, allowing the detection of OSL signal with a wavelength shorter than 360 nm. For detection, we have a photodetector module with a photomultiplier tube. We compared the readouts with commercial readers, respecting each reader's different characteristics, which present different wavelengths for optical stimuli (blue and green, respectively) in CW-OSL and POSL modes. The obtained results concluded that the developed reader could be applied for OSL readouts of detectors exposed to a few hundred of mGy in POSL mode and high doses (up to a few Gy) in CW-OSL mode.

Automated summary

In this study, the sensitivity of a newly designed OSL system was compared with two commercial systems by performing OSL readouts of Al2O3:C irradiated with different doses. The newly designed system used a cluster of blue LEDs for optical stimulation in both continuous wave (CW-OSL) and pulsed (POSL) modes, and a bandpass filter was used for detection. The results showed that the developed reader could be used for OSL readouts of detectors exposed to both low doses in POSL mode and high doses in CW-OSL mode.