Radiation dosimetry with an electron spin resonance spectrometer

Area of Science:

• Physics
• Chemistry
• Radiation Science

Background:

• Electron spin resonance (ESR) spectroscopy is a valuable technique for detecting unpaired electrons.
• Ionizing radiation creates unpaired electrons in various materials.
• Sugar can serve as a dosimeter material for radiation measurement.

Purpose of the Study:

• To investigate the use of electron spin resonance (ESR) for radiation dosimetry in an educational laboratory setting.
• To determine the effectiveness of sugar as a dosimeter for X-ray and Cobalt-60 radiation.
• To establish the detection limit of ESR-based dosimetry using sugar.

Main Methods:

• Utilized an electron spin resonance (ESR) spectrometer for measurements.
• Irradiated sugar samples with an X-ray generator (34 kVp, 8 mA) and a 60Co sealed source (3.7 MBq).
• Analyzed the ESR signal intensity, which correlates with the absorbed radiation dose.

Main Results:

• The ESR spectrometer successfully detected unpaired electrons generated by ionizing radiation in sugar.
• The developed method demonstrated a lowest detection limit for absorption dose of 20 Gy.
• The study confirmed the feasibility of using sugar as a dosimeter in student laboratories.

Conclusions:

• Electron spin resonance (ESR) spectroscopy is a viable method for radiation dosimetry in educational experiments.
• Sugar can be effectively employed as a dosimeter material for quantifying absorbed radiation doses.
• The ESR technique with sugar offers a practical approach for demonstrating radiation effects and measurement principles to students.