Exposure rate by the spectrum dose index method using plastic scintillator detectors

Area of Science:

• Medical Physics
• Radiation Detection and Measurement

Background:

• Plastic scintillator detectors are used in radiation monitoring.
• Accurate exposure rate measurement is crucial for radiation safety and dosimetry.
• Traditional methods may face challenges with specific detector types like plastic scintillators.

Purpose of the Study:

• To evaluate the applicability of the spectrum dose index (SDI) method for plastic scintillator detectors.
• To assess the feasibility of calculating exposure rates using SDI with scintillator data.
• To compare SDI-derived rates with established measurement techniques.

Main Methods:

• Irradiating a portal detector system with various gamma sources and natural background radiation.
• Utilizing a modified spectrum dose index (SDI) algorithm.
• Comparing measurements with a calibrated pressurised ion chamber.

Main Results:

• The modified SDI algorithm successfully calculated exposure rates for plastic scintillator detectors.
• The method proved effective despite the absence of characteristic photopeaks in the scintillator spectra.
• SDI-calculated rates showed good agreement with ion chamber measurements.

Conclusions:

• The spectrum dose index (SDI) method, with modifications, is suitable for determining exposure rates from plastic scintillator systems.
• This approach offers a practical solution for dosimetry applications using detectors lacking photopeaks.
• The findings support the broader application of SDI in radiation measurement scenarios.