A Real-Time Energy Response Correction Method for Cs₃Cu₂I₅:Tl Scintillating Dosimeter.

Area of Science:

• Medical Physics
• Radiation Detection and Measurement

Background:

• Radiation detectors exhibit uneven energy responses, limiting dose rate meter accuracy in radiation protection.
• Current physical shielding compensation methods result in significant energy response errors (15-25%).

Purpose of the Study:

• To develop a real-time energy response correction method for radiation protection dose rate meters.
• To enhance the accuracy of dose rate measurements using a novel scintillation detector.

Main Methods:

• Design and implementation of a novel Cs3Cu2I5:Tl scintillation detector.
• Application of pulse amplitude weighting (PAW) technique to segment pulse amplitude histograms for real-time correction.
• Experimental validation of the detector's energy response across a range of photon energies.

Main Results:

• The Cs3Cu2I5:Tl detector with PAW correction achieved an almost constant energy response.
• Maximum response error was 8.26% for photon energies from 33 keV to 1.25 MeV (compared to 137Cs gamma rays).
• Performance significantly exceeds the IEC 61526:2010 recommendation of ±30%.

Conclusions:

• The pulse amplitude weighting (PAW) method is feasible for real-time energy response correction in radiation detectors.
• This novel detector design substantially improves the accuracy of dose rate meters for radiation protection applications.