ELECTRON PARAMAGNETIC RESONANCE (EPR) DOSIMETRYElectron paramagnetic resonance (EPR) dosimetry is a physical method for the assessment of absorbed dose from ionising radiation. It is based on the measurement of stable radiation induced radicals in human calcified
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ELECTRON PARAMAGNETIC RESONANCE (EPR) DOSIMETRY
Electron paramagnetic resonance (EPR)
dosimetry is a physical method for the assessment of
absorbed dose from ionising radiation. It is based on the measurement of stable radiation induced radicals in human calcified tissues (primarily in tooth enamel).
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RESONANCE CONDITION hν = gµBB ν is resonance frequency h is
Plank’s constant g is the g-factor µB is the Bohr magneton B
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CLASSES OF EPR SPECTROMETERS Large research spectrometers Middle-class spectrometers Small
spectrometers
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ADVANTAGES AND DISADVANTAGES OF THE EPR METHOD +
measure the volume of samples;
dose reconstruction to the distinctive tissues; dose reconstruction after long periods of exposure; dose reconstruction for many years after the exposure.
- the difficulty in collecting material for analysis; reconstruction of the individual dose is complicated and labour-consuming.