Development and Performance Characteristics of Personal Gamma Spectrometer for Radiation Monitoring Applications.

Area of Science:

• Nuclear Instrumentation
• Materials Science

Background:

• Gamma (γ) radiation detection is crucial for homeland security and environmental monitoring.
• Existing gamma spectrometers can be bulky, power-intensive, and lack remote accessibility.

Purpose of the Study:

• To develop a compact, low-power, and remotely accessible personal gamma spectrometer.
• To evaluate the performance of a Ce-doped Gd-Al-Ga-garnet (Ce:GAGG) crystal coupled with a Si photomultiplier (SiPM) for gamma spectroscopy.

Main Methods:

• A prototype gamma spectrometer was constructed using a 3 × 3 × 20 mm³ Ce:GAGG crystal and a SiPM detector.
• The spectrometer was designed for remote access via mobile devices.
• Performance was assessed at room temperature by measuring energy resolutions for standard gamma sources.

Main Results:

• The Ce:GAGG-SiPM spectrometer achieved energy resolutions of 13.5% (0.356 MeV), 6.9% (0.511 MeV), 5.8% (0.662 MeV), and 2.3% (1.33 MeV).
• The device demonstrated low power consumption (2.7 W), compact size (5.0 × 7.0 cm²), and light weight (340 g).

Conclusions:

• The developed personal gamma spectrometer is a viable solution for mobile radiation monitoring.
• Its portability, low power usage, and remote access capabilities make it suitable for diverse applications.