EPR dosimetric properties of 2-methylalanine pellet for radiation processing application

• Preparation of 2-methyl alanine pellets for high-dose dosimetry (1–100 kGy).
• The dosimeter response is humidity independent in 33–76% relative humidity range during irradiation.
• The temperature coefficient equals 0.96%/°C in the range of 21–60 °C.
• Overall uncertainty of the dosimeter not exceeds 6.9% at 2σ.

The dosimetric characteristics of γ-radiation induced free radicals in 2-methylalanine (2MA) pellet dosimeter are investigated using electron paramagnetic resonance (EPR) in the high-dose range of 1–100 kGy. The EPR spectrum of γ-irradiated 2MA exhibits an isotropic EPR signal with seven lines. The dosimeter response is humidity independent in the range of 33–76% relative humidity. The manufactured dosimeter is typically adipose tissue equivalent in the energy level of 0.1–15 MeV. The overall uncertainty (2σ) of the dosimeter is less than 6.9%.