Intercomparison of dosimetry systems based on CaF2:Mn TL detectors

Area of Science:

• Medical Physics
• Radiation Dosimetry

Background:

• Thermoluminescence (TL) dosimetry is crucial for radiation monitoring.
• Accurate dose assessment requires reliable and comparable dosimetry systems.
• In-house developed systems need validation against established ones.

Purpose of the Study:

• To compare the performance of an in-house developed MR200 TL dosimetry system with a commercial TOLEDO TL system.
• To evaluate the accuracy and reproducibility of the MR200 system across various radiation doses.
• To identify any necessary corrections for the MR200 system's readings.

Main Methods:

• Ten measurements were conducted using both MR200 and TOLEDO systems.
• Dose range from 0.01 mSv to 5 Sv.
• 36 CaF2:Mn dosemeters were irradiated with 137Cs and 60Co sources.

Main Results:

• Reader outputs showed less than 5% difference below 0.1 Sv.
• MR200 reader results require correction factors for doses exceeding 1 Sv.
• Reproducibility of the MR200 system was assessed.

Conclusions:

• The MR200 TL dosimetry system demonstrates comparable performance to the TOLEDO system at lower doses.
• Correction factors are necessary for accurate dosimetry with the MR200 system at higher doses (>1 Sv).
• Further validation of the MR200 system's reproducibility is confirmed.