Application of low frequency EPR imaging to alanine dosimetry

Two-dimensional EPR imaging experiments were performed using alanine dosimeters irradiated at different doses. The imaging apparatus is based on a low frequency spectrometer utilizing a high Q reentrant cavity and air coils to provide the magnetic field gradients. The dosimeters were made from a mix...

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Bibliographic Details
Published in:Applied radiation and isotopes 1993, Vol.44 (1), p.391-395
Main Authors: Colacicchi, S., Onori, S., Petetti, E., Sotgiu, A.
Format: Article
Language:English
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Summary:Two-dimensional EPR imaging experiments were performed using alanine dosimeters irradiated at different doses. The imaging apparatus is based on a low frequency spectrometer utilizing a high Q reentrant cavity and air coils to provide the magnetic field gradients. The dosimeters were made from a mixture of alanine powder and paraffin molded into small cylinders with a diameter of 5 mm and a height of either 2 or 10 mm. The EPR line width is much larger than that of the other species usually employed for imaging. Byusing deconvolution techniques it was possible, in the presence of this complex spectrum of 0.0135 T, to obtain a spatial resolution of 1 mm with a gradient intensity of 0.13 T/cm.
ISSN:0969-8043
1872-9800
DOI:10.1016/0969-8043(93)90254-8