Evaluation of materials for developing a new individual dosemeter using electron spin resonance spectroscopy

Area of Science:

• Radiochemistry
• Materials Science
• Radiation Detection

Background:

• Alanine dosemeters are standard for radiation measurement but lack sensitivity at low doses (mGy range).
• Evaluating low-level radiation exposure is crucial in various scientific and medical fields.
• A need exists for sensitive and accurate dosimetry materials capable of measuring a wide dose range.

Purpose of the Study:

• To investigate hydroxyapatite as a potential material for a new radiation dosemeter.
• To assess hydroxyapatite's suitability for detecting radiation doses from milligray (mGy) to gray (Gy) levels.
• To compare hydroxyapatite's performance with existing dosimetry techniques.

Main Methods:

• Application of electron spin resonance (ESR) dosimetry technique.
• Utilizing commercially available synthetic hydroxyapatite.
• Testing the material's response across a radiation dose range from mGy to Gy.

Main Results:

• Synthetic hydroxyapatite exhibits essential characteristics suitable for dosemeter applications.
• The material accurately measures radiation doses within the mGy to Gy range.
• Electron spin resonance successfully detected radiation-induced changes in hydroxyapatite.

Conclusions:

• Hydroxyapatite is a viable candidate for developing a new, sensitive radiation dosemeter.
• This material offers improved low-dose detection capabilities compared to alanine dosemeters.
• Further research could establish hydroxyapatite-based dosimetry for various applications.