A TL/OSL emission spectrometer extension of the Risø reader

Area of Science:

• Optics and Photonics
• Spectroscopy
• Radiation Detection

Background:

• Luminescence spectroscopy is crucial for radiation dosimetry and material analysis.
• Existing systems can be bulky and expensive, limiting accessibility.
• The need for compact, cost-effective instrumentation for sensitive measurements is growing.

Purpose of the Study:

• To describe the integration of a low-cost, compact spectrometer with the Risø reader.
• To demonstrate the system's capability for analyzing luminescence spectra.
• To evaluate the system's sensitivity for radiation dose measurements.

Main Methods:

• Integration of a compact spectrometer with an optical fiber to a Risø reader.
• Utilizing a high-sensitivity 2048-element CCD-linear array detector (Avantes PC2000) for UV-VIS measurements.
• Acquisition of 3-D luminescence spectra as a function of temperature (thermally stimulated) and time (optically stimulated).

Main Results:

• The integrated system successfully measured luminescence spectra.
• The CCD detector exhibited low readout noise and high photon sensitivity (86 photons/count).
• CaF2:Tm (TLD-300) spectra were distinguishable from background noise at a 0.7 Gy dose level.

Conclusions:

• The developed compact spectrometer system offers a sensitive and cost-effective solution for luminescence measurements.
• This integration enhances the capabilities of the Risø reader for advanced spectroscopic analysis.
• The system demonstrates potential for accurate low-dose radiation detection and material characterization.