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 2 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. By using 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.
Application of low frequency EPR imaging to alanine dosimetry
COLACICCHI, SILVIA;
1993-01-01
Abstract
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 2 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. By using 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.Pubblicazioni consigliate
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