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Assessment of an alanine EPR dosimetry technique with enhanced precision and accuracy.
Nucl. Instrum. Methods Phys. Res. Sect. A 440, 453-461 (2000)
Dose reconstruction in the course of a series of blind tests demonstrated that an accuracy of 10 mGy for low doses and 1% for high doses can be achieved using EPR spectroscopy. This was accomplished using a combination of methodologies including polynomial filtration of the EPR spectrum, dosimeter rotation during scanning, use of an EPR standard fixed into the resonator and subtraction of all nonradiogenic signals. Doses were reconstructed over the range of 0.01-1000 Gy using this compound spectral EPR analysis. This EPR technique, being equally applicable to fractionated doses (such as those delivered during multiple radiotherapy treatments), was verified to exhibit dose reciprocity. Irradiated alanine dosimeters which were stored exhibited compound spectral EPR signal fading of ca 3 % over 9 months. All error estimates given in this paper are given at the 1 standard deviation level and unless otherwise specified do not account for uncertainties in source calibration.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
EPR; ESR; Ionizing radiation; Dosimetry; Alanine; Nondestructive
Language
english
Publication Year
2000
HGF-reported in Year
0
ISSN (print) / ISBN
0168-9002
e-ISSN
1872-9576
Quellenangaben
Volume: 440,
Pages: 453-461
Publisher
Elsevier
Reviewing status
Peer reviewed
Institute(s)
Institute of Radiation Protection (ISS)
Research field(s)
Radiation Sciences
PSP Element(s)
FE 71166
Erfassungsdatum
2000-12-31